Car Idling Problems

Manufactures have removed these adjustments on modern vehicles. One problem that can occur with this component is a loss of power (from a severed line or a short) – but a more common problem is simply dirt and grime. It will not idle at all, even if I try to give it gas it still dies. Car slight jerk at idle and jerks when pressing throttle - posted in Maintenance & Repairs: hi, have a problem today. The result is a lopey idle, or a car that won't start. The first 25 miles was local stop and go traffic. ive got big problems with my golf, taken it to 4 garages now and no-one can find the fault, the car is juddering when idling, when coming to junctions the car feels like it wants to stall, on revving the the car black smoke comes out but not when driving, ive had the maf changed, the temp sensor and the lumba sensor, pipes have been checked and. Is that the fix itself, is it worth fixing, what is causing this problem. As long as the fuel mileage is fine, it isn't missing,. Holes in the air intake valve. In this article, we’ll show you how to clean an EGR valve. Here's what to do if your car stalls out. Car shakes when idle can also because of this car part This one along with other belt types such as V-belts and serpentine belts could create this annoying problem. The first uses a small idle speed control servo motor which is driven by the computer. You have to have a good idle motor that is not sticky. This week on The Best of Car Talk, Dana's wife's Volvo's brakes squeak, but only when Dana drives the car. The problem is that anytime I stop and the car idles, the heat goes away. 2) But this made the IACV go all funky a few weeks later and produce an P0505. When the truck is at a stop and sitting still at a light it stops. Still remove each Vacuum line and plug them first to see if that is the problems first. Cleaning the Idle Air Speed Control Valve with aerosol throttle cleaner can often solve an idle problem. The reversed pressure can break away encrusted pieces and all of a sudden there is a leak. Jeep dealer says they think the Idle Air Control Valve I purchased from www. In reality, an engine restart uses fuel approximately equal to 10 seconds of idling. Comments: hi, I have a problem with car idling, when the engine is cold, the engine has aprox 400rpm close to 0rpm when the engine gets hot, it is getting under 0rpm and very often dies. 2L) I6 isn't a power house, but it has gobs of low RPM torque that makes it a great engine off-road. Car Stall Problems of Chevrolet Equinox - part 1 Chevrolet Equinox owners have reported 112 problems related to car stall (under the engine and engine cooling category). One problem that can occur with this component is a loss of power (from a severed line or a short) – but a more common problem is simply dirt and grime. Smog--your car puts out more pollution. The term "rough idle" means that the engine does not run smoothly when idling. I am about to buy one and i tried the car for a little while, first of all tell me when it shows ECO IDLE in orange color in the meter what does that mean ? And when does it go green ? When i push the Eco idle off button the ECO IDLE FROM THE METER GOES AWAY and when i drove on that the car gave me 15km per litre with AC. The car idles around 750 rpm according to the tach. idle synonyms, idle pronunciation, idle translation, English dictionary definition of idle. It may only misbehave on damp days. millions of cars and trucks idle needlessly, sometimes for hours and an idling car can release as much pollution as a moving car You may not be able to avoid keeping your engine running when you're stopped. Since there is an endless list of possible causes for these types of car problems I decided to break out my old fashioned vacuum gauge and run a simple engine vacuum test. Sometimes, the computer can tell you what is wrong [instructions]. So when your vehicle's engine stalls when you kick your vehicle into idle mode, have a look at the idle control valve. I have a 2003 RX300, problem when starting specially when hot weather. I've noticed that this happens at a stop, with the foot on the brake and this happens more in cold temps. If your car seems to be revved up to a higher-than-normal RPM while idling, it's not necessarily a problem. Get more miles out of your tank. It idles so high that it can be safely driven plus the fear of damaging my clutch or even the engine on these cold mornings. This small valve is fitted onto the throttle body and controls the quantity of air flowing into the engine. Idling is, in fact, the. Why Doesn't My Car's A/C Work? | Angie's List Join Now Sign In Business Owners. Below are the four most common. When it happened the first time the check engine light came on. got a 98 reg Corsa that's had a lot of problems with idling & cold starts, it was suggested in this group that there might be a problem with the idle. Rather than idling for ~3 minutes while each car ahead of me got washed, I just shut the engine off. The AC compressor may not be pumping sufficiently at slower RPM's (revolutions per minute). It's up to you to find the cause of the mixture issue. Free help for car problems, car complaints, recalls and car repairs. Engine rough idle problems arise because car engines are demanding. A rough idling car is more of an inconvenience at first but if the problem is not solved it can quickly lead to bigger problems such as slow acceleration, stalling and eventually a vehicle that will not start at all. Any mechanics in the house? Originally Posted by radium Hi Guys, my car won't idle, it started playing up a couple of days a ago, where it kept dying after I started, but then it came right. Ive noticed when the car has been driving for a while whenever i come to a red light, the car will idle at about 800, 900 rpm which is fine (i think) but then after 30 seconds it will drop down to about 300/400 rpm when the car will shake like its about. It will be a year ago in March that I put my JDM B16 SIR II into my del sol. All right, we're through the Idle Channel Restriction and headed straight down to the idle discharge ports. The fix here is to reflash the PCM with updated information. com has gone bad already. The computer controls that and the computer thinks it needs to rev that high. Idling and driveability problems can be caused by a variety of issues. Whining noise coming from the front of the car. One of the most common problems is likely a rough running or poorly idling engine. I think part of the reason is that there are so many possible causes of an idle problem, so it ends up being a common issue. How to repair Bad idle speed problem in car. If I shift the car into neutral, the idle will jump to 1200 rpm. Then one day after driving on the freeway the idle would stay at about 2500 RPM when slowing and then fluctuate from 900-2500 RPM at a stop. MERCEDES BENZ CLASS C II 203 C180 Kompressor Idle Problem I am new to the site and already have a little problem. It's the EGR valve. Causes of a rough idle. When either of these problems occurs, your car can begin to stall when idle. I also had the fuel injectors cleaned but to no avail. I have a weird stalling problem that I am trying to fix. Idle improved as car warmed up. Honda Civic: Why is My Idle Having Problems? and how much it actually has. So you think it is, don’t push Off. I have a 5mm ID braided hose that runs alongside the wiring from the fuse box to a hole in the front panel behind the bumper but I cannot see if this joins the hose from the wheel arch. How to Spot a Lemon: 6 Things to Look For When Buying a Used Car. to address the issue. The result is a lopey idle, or a car that won't start. Squeaks creaks or clunks coming from near your wheels. The problem arises when the car gets some miles on it (usually 75K+) and carbon fouling takes its toll. Isabelle Silverman, who runs EDF's anti-idling campaign, says that car idling "is the second-hand smoking of the outdoors. The first two posts contain all the updates to the fixes. I've been told several things that could be wrong such as needing a motor mount, replacing the catalytic converter, and it being a potential exhaust leak. - Bad O2 Sensor - Bad Coolant Sensor - Bad Throttle position sensor (TPS)-Now I have read that the TPS is the culprit when the idle surge starts right after you start the car. I have a 2005 Tuscon, my problems all started when my car suddenly started stalling at random times, it did throw a code for the crankshaft position sensor. After all this the engine started revving up and down when idling. We provide the right products at the right prices. the in tank fuel pump & filter has been replaced. idling synonyms, idling pronunciation, idling translation, English dictionary definition of idling. Through this article, I also hope to give you simple ideas on how to fix this vibration problem. Took car to alignment shop for front end work/alignment. I went to Pick n Pull and got a valve cheap it fixed the problem and the car no longer revs at idle. It's that common rough idle problem with the protege. The car has about 82,300 miles now. If I shift it into reverse, the idle goes back to normal (600 rpm). The car is nearly completed and I am starting to put some miles on the car. Once you do, I'm sure you'll be able to get rid of that idle problem. Rich idle adjustment. Jeep dealer says they think the Idle Air Control Valve I purchased from www. The problem is whenever at idle speed, the idle speed fluctuates. If I give it a tiny bit of gas and bring the idle up a bit to 1200 rpm, the air becomes hot again. Ted's House e30 BMW Car Pages: e30 Vacuum Leak. A search would have brought up the Surging Idle sticky & item #6 on the checklist 10 Pin salt & pepper shakers See the "Surging Idle Checklist for help with all your idle/stall problems. So when your vehicle's engine stalls when you kick your vehicle into idle mode, have a look at the idle control valve. Then one day after driving on the freeway the idle would stay at about 2500 RPM when slowing and then fluctuate from 900-2500 RPM at a stop. The first uses a small idle speed control servo motor which is driven by the computer. Rough Idle Diagnosis My diagnostic journey began with a visual inspection revealing this Mazda 626 had actually been well cared for. It's the EGR valve. It's that common rough idle problem with the protege. My car idles fine just sitting but when I come to a light and push in the clutch to stop, the RPM's will fall and over shoot my idle (850) and the car almost stalls and then the IAC tries to recover and it surges for a few times trying not to stall before it stabilizes at 850 again. In reality, an engine restart uses fuel approximately equal to 10 seconds of idling. Regular inspection of carburetor parts is recommended. Over the last couple of weeks I've noticed a problem with my car that seems to be getting worse with time. That said – the reset procedure can reset values that are no longer applicable. In this article, we'll show you how to clean an EGR valve. RPM go up and down. Common Signs When The Idle Air Control Valve Goes Bad Whenever you see the check engine light on your car glows constantly, there is a possibility the idle air control valve is facing a problem. It doesnt require too much in the way of sophisticated tools to diagnose most problems. 8 two barrel carb. Problem: After driving about 2 miles, on traffic lights RPMs go down and car stalls on idle. Whenever I have the car stopped the engine chugs. Problem goes away after 10-15 minutes of driving. Help, I'm at my wit's end with my 97 LX protege 1. Is the car taking longer to warm up than it used to, or is it the same? It could be that the car is just running cooler because of the new radiator/thermostat. Sometimes parts go bad, which results in your car idling strangely or sta. Diagnose Made Easy Don’t know what’s wrong with your car? Then use AutoMD’s intuitive "question tree" car diagnostic feature. Spark Plugs. Sometimes, the computer can tell you what is wrong [instructions]. Nisson had our car for four days and still could not find a permanent cure. Lasted about an hour before it would not idle AGAIN. All right, we're through the Idle Channel Restriction and headed straight down to the idle discharge ports. The car now runs like I think it should. A rough idle should be inspected and repaired as quickly as possible. Once you do, I'm sure you'll be able to get rid of that idle problem. The problem got progressively worse over a few months to the point where the idle would drop quite a bit and the CE light would come on after only 30-seconds or so. Over the last couple of days, the car has started acting up again in the same manner. Many of us of a certain generation were taught, in fact, that it was safer to let your car idle before you drove it. The car was running fine for about a month but recently while idling it has been making a low pitched noise that seems to change as the engine idles. Not sure if related. If your EGR valve is faulty its almost certainly doing this. Many of us of a certain generation were taught, in fact, that it was safer to let your car idle before you drove it. Any mechanics in the house? Originally Posted by radium Hi Guys, my car won't idle, it started playing up a couple of days a ago, where it kept dying after I started, but then it came right. No rough idle or other problems were noted. hope you guys know what it is. The most likely reason for this type of problem is that your fan isn't working, but the reason, and the fix, will differ depending on the car you drive. Problems with idle speed—things like slow idle, fast idle, rough idle, or stalling after idling for a few seconds—are symptoms that something is wrong with your engine. Depending on the severity of the vacuum leak, the car may not be able to idle at all and will stall. Another thing is that when i turn the car off with the oil warmed up to 90 degrees and then start it again after a couple of minutes, the idle is a bit unstable for 2 or 3 seconds, then calms down. Once you do, I'm sure you'll be able to get rid of that idle problem. The most likely cause is an over-rich mixture but any defect which produces uneven explosions or missing will cause a rough idle. Idling is, in fact, the. If the idle motor is good, just a small adjustment in the curb idle screw could stop your problem. This fast idling of a semi warm engine is not good for it. Never had any problems before but now the entire car starts to shake when idling or accelerating and my car is losing power when driving up hill, I live in the mountains. And idling problems are really hard to pinpoint. Usually going up and down between 500 and 750, causing the car to shake violently. There are a number of potential causes for this problem. The first two posts contain all the updates to the fixes. I'm unsure what it could be. If the motor mount breaks or gets disconnected from the engine, it can create a distinctive shaking sensation whenever your car is at an idle. But while I agree that lubrication isn't the reason for the idle being either high or normal, there's something in the LOF process done by the mechanic that caused the problem. The car has been idling roughly and jerking randomly. If the vehicle shakes or the engine shudders a lot when stopped at a stoplight, or when parked with the engine idling, it might indicate the motor mounts or transmission mounts are damaged or broken. So I can understand why some people might want to keep their cool, air conditioned cars idling while waiting for someone or at a drive thru. My question is how to you do the above cleaning, is this where you add chemical with your gas. Help, I'm at my wit's end with my 97 LX protege 1. The car will idle for a few seconds (~20) and then the idle gets really rough and the car stalls out. If you are experiencing a car idle rough and an RPM high, then there are a variety of reasons for why this could be happening. Common reasons include vacuum leaks, carburetor problems, ignition issues, damaged power circuits and dirty fuel injectors. com, there are several reasons vehicles idle low. got a 98 reg Corsa that's had a lot of problems with idling & cold starts, it was suggested in this group that there might be a problem with the idle. Does your car shake or shutter while stopped or idling? These 5 reasons could be why. Cleaning the Idle Air Speed Control Valve with aerosol throttle cleaner can often solve an idle problem. Car runs rough and shakes while idle at stop light. With a large vacuum leak, the car may idle correctly. My car'r RPM was fluctuating again. Beware If Your Car May Encounter This Problem. 1988 Lincoln TC has high idle and surge problems 4 Answers. To see if this is really the problem, shift the car into neutral. Your spark plugs are responsible for sending electric currents to your car's engine from the ignition. With a large vacuum leak, the car may idle correctly. The result is a lopey idle, or a car that won't start. The causes might vary, but most idle problems are caused by a mixture issue. I have a 2000 silverado LT - Answered by a verified Auto Mechanic. Steel said it would idle East Chicago Tin days after the food production and distribution company Del Monte announced it would shutter two tin canning plants, laying off more than 800 workers. Ford Fleet has determined that every hour of idling is equivalent to 33 miles of driving on their police pursuit vehicles as many police cars idle for hours and it's not uncommon to accumulate 10,000 hours of idle time in 2-4 years. So if your car shakes when idle , check out if any of these parts are broken or loose. On to the idle problem, then. Own a car long enough and there's a good chance you'll develop auto problems of some nature. Soaking in cleaner is the only way to really clean that correctly. The computer controls that and the computer thinks it needs to rev that high. So if your car shakes when idle , check out if any of these parts are broken or loose. Everyday in the U. The following is a chart of potential carburetor problems and possible remedies. my problem sounds a little like this… the only difference is the way my car idles… And all this happens sporadically… and sometimes even if the air is off… my 2007 Camry will idle at about 450-500. And this kind of idling as well as cold engine idling in winter has no benefit at all. Idling is, in fact, the. On older cars equipped with a carburetor, there are different ways to determine how to correct the problem. If you don’t think your engine’s still running, you might forget to turn it off. - Bad O2 Sensor - Bad Coolant Sensor - Bad Throttle position sensor (TPS)-Now I have read that the TPS is the culprit when the idle surge starts right after you start the car. RPM go up and down. Ive noticed when the car has been driving for a while whenever i come to a red light, the car will idle at about 800, 900 rpm which is fine (i think) but then after 30 seconds it will drop down to about 300/400 rpm when the car will shake like its about. But don't confuse warm air coming from your car's radiator with a warm engine. The idle of a car engine is kind of like a human heartbeat: You can tell what shape it's in just by listening. I have a 1997 honda crv with 195,000 miles on it. Many different problems could result in a rough idle for your car or truck, including: dirty fuel injectors, clogged air filters, bad spark plugs, and a variety of exhaust system issues. No problems till this morning. The idle air control valve — also known as the "idle speed control valve" — regulates the idle speed of your engine. just purchased the car from my uncle and he was having problems out of the carb so rebuilt it and now it isn't idling right, what might be done to fix this problem, it has the factory 3. The other thing is we talk about more than 3 Minutes meaningless idle. The term "rough idle" means that the engine does not run smoothly when idling. anyone come across idle problems on ea`s with throttle body injection ? the problem is that the idle" hunts"i,e. On the other hand, you shouldn't stop and start your car too much either. What's more, it often creeps up on you gradually and subtly — until one day you find yourself wondering how you ever put up with such an annoyance. Sometimes back flushing can cause problems if you have a rusty coolant system. And idling problems are really hard to pinpoint. 0 Lit The ODB read a alarm code miss fire. Have a rough idling problem with engine on and trans in park with the AC running. Toyota Camry 2007-2011: Why is My Car Idling Rough? The Toyota Camry is well regarded for its overall dependability and longevity, but without proper maintenance, it can run poorly and idle with a vibration that can loosen tooth fillings. It doesnt require too much in the way of sophisticated tools to diagnose most problems. Idling definition, not working or active; unemployed; doing nothing: idle workers. QuadraJet Idle Problem from corvetteforum. While emergency vehicles are usually exempt from. The temperature gauge stays right in the middle like always. Fuel pressure should not drop below 2. It was bad, I replaced it. You have to have a good idle motor that is not sticky. Sometime dirty parts can also be the root cause of a rough. low and rough idle and stalling at complete stops. Learn more about the most common brake issues and their solutions, here. You have to tap the gas pedal and "kick the idle down". Some cars, especially older cars with carburetors are designed to run at 1200 rpm or so until they are warmed up. Another idling problem you may notice is too high of an idle. When in drive the engine shutters whether A/C is on or off. In the past, adjusting an engine’s idle speed was easy. I dont believe its a timing issue as the car performs well on the road. idle synonyms, idle pronunciation, idle translation, English dictionary definition of idle. Volkswagen Golf III - mk3 golf idling problem. Published Dec 7th, 2015. This might mean ordering less frequently or placing only minimum orders. Idle-stop systems alleviate the fuel economy problems of sitting in traffic. This chart is intended to be a helpful guide when troubleshooting your carburetor. Everyday in the U. When it happened the first time the check engine light came on. Toyota Camry 2007-2011: Why is My Car Idling Rough? The Toyota Camry is well regarded for its overall dependability and longevity, but without proper maintenance, it can run poorly and idle with a vibration that can loosen tooth fillings. I have a problem with my car smoking after sitting at idle for a few minutes. It will not only damage the car and waste your money, but harm much more than t 5 Reasons Why Idling Your Car Is Bad. I threw some A/C Pro in the system. Dirty air cleaner. I had 10W replace the 5W-30 and the car does start up and run smoother for the crucial first few minutes. Regular inspection of carburetor parts is recommended. Trouble Starting and Rough Idle on Start Up. Usually when I'm at a stop, it idles at just under 1k RPMs. Intermittent sensor failure or shorting can cause the computer to act strange with unusual side effects, these problems are particularly tough to diagnose. Prior to this, the car was running fine and I had no idle problems. It idles so high that it can be safely driven plus the fear of damaging my clutch or even the engine on these cold mornings. Common Signs When The Idle Air Control Valve Goes Bad Whenever you see the check engine light on your car glows constantly, there is a possibility the idle air control valve is facing a problem. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. Regular car maintenance is very important and will help increase the life of your car, not to mention not getting stuck in untimely and sticky. The shop might have to fiddle with the ETC tables a bit to calm down the movement of the throttle plate to regulate the idle. I've been told several things that could be wrong such as needing a motor mount, replacing the catalytic converter, and it being a potential exhaust leak. Idle dips when a/c is turned on (SOLVED) I finally bit the bullet and decided to return the modified (by previous owner) ac system. Get more miles out of your tank. Hopefully, the idle will be at about 750rpm. Put the car in neutral at this time and the idle would climb to 1200 usually, sometimes 1500. RPM go up and down. Does his wife have a heavy foot or is Dana driving too much like a geek?. CarComplaints. Help, I'm at my wit's end with my 97 LX protege 1. According to the Hinkle Charitable Foundation, "idling an engine forces it to operate in a very. Zafirs erratic idle. When the truck is at a stop and sitting still at a light it stops. Did it every time when warmed up. Problem: After driving about 2 miles, on traffic lights RPMs go down and car stalls on idle. Car idling rough inspection, troubleshooting. I think part of the reason is that there are so many possible causes of an idle problem, so it ends up being a common issue. One problem that can occur with this component is a loss of power (from a severed line or a short) – but a more common problem is simply dirt and grime. In gear, with my foot on the brake, the idle would surge from 600-900, maybe a 2 second cycle. So you might think by idling your car, you're warming it up, which will prevent this problem. How to Fix High Idle. Luckily it did eventually start after it sat around for a few minutes. The engine is rebuilt with all new seals and the turbo as well. Learn about some possible reasons causing rough idle here. Rpm while idling is highly unpredictable after filling up. Perhaps one of the most notable vacuum leak symptoms is a rough idle. I adjusted the new throttle cable and installed a new govenor cable as weel and tweeked both of those. Catalytic Converters) thus causing a sudden change in normal engine running. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. No more code, problem is that the car would still randomly stall if i was driving 65 MPH or idling in driveway with no code. Right now, my car idles very rough, interior vibrates like crazy when I pull to a stop sign or stop light, with the brakes pressed, and in drive. The fix here is to reflash the PCM with updated information. Cars parked too long can develop problems. there are also a number of other problems if your car has idle problems. Not idling after being jump started leads me to believe that something was damaged in the process. You say the cables were connected properly, not reversed. This problem has been getting worse over the last 2 years. Idle Surge) For those of you who may have missed the thread regarding my idle surge, here's a brief summary: - One hot Saturday in June, I was driving happily along the freeway. Letting your car idle while in park might not seem like a big deal. The engine design made for poor starting, oils were heavy adding to cranking difficulties especially in extreme cold temperatures, fuel gelled in cold temperatures, poor batteries and cranking. What you describe is normal. Re: Club Car precedent problem with idle thanks for the info twist. And this kind of idling as well as cold engine idling in winter has no benefit at all. It's up to you to find the cause of the mixture issue. So you might think by idling your car, you're warming it up, which will prevent this problem. A chugging noise could mean a blockage in the exhaust system. The car surges. Learn how idle-stop systems work and how common they are on new cars. We have been to our local mechanic three times and Nilsson mechanics which. Re: Club Car precedent problem with idle thanks for the info twist. What's wrong with YOUR car? Find out common car problems directly from owners like yourself. That pump is outta here. Diesel Idling Myths and Facts How did this habit get started? Early model diesel fueled trucks, first diesel fuel trucks 1932, had some inherent problems. The best course of action is to take your vehicle to an Omaha auto service professional, but here are a few things it could be…. The unfortunate truth is that engine noises can mean anything from a simple quick-fix, to a complete engine overhaul that may not be worth the money if your car has some gnarls in its beard. Vacuum Leak. idle synonyms, idle pronunciation, idle translation, English dictionary definition of idle. CORSA iDLING PROBLEM 5 Answers I have a 2003 opel corsa 1. Yesterday I read the article about advancing the timing to 14 or 16 degrees and decided to try it. It could cause some skipping on accelration or problems with idling as noted here, but probably not. Car engine idling. With most fuel pumps the minimum fuel pressure is encountered at high rpm and WOT. Drive-ability at speed and acceleration felt flat but it was still driving. On older cars equipped with a carburetor, there are different ways to determine how to correct the problem. Reducing idle parts inventory can be cathartic, but it’s a mistake to unload inventory without having a plan to prevent the problem from reoccurring. Problems With Ford Engines Idling by Chris Stevenson All engines at one time or another will have idle problems; Ford engines can have idle stumbling, surges and stall-outs, no matter what make and year. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. These are common problems related to the idle. I have a 2003 RX300, problem when starting specially when hot weather. Step 1 - If the check engine or service engine light soon has illuminated retrieving the diagnostic trouble codes could lead you in the right direction of what the problem is, or is related too. The National Highway Traffic Safety Administration (NHTSA) is currently investigating reports of sudden stalling with Toyota Prius hybrid electric cars. Or maybe something with the fuelfilter or something linked to the fuel, but because of the sputter while idle i guess the first option. Damaged or dirty fuel injectors can cause the same problem. Steel said it would idle East Chicago Tin days after the food production and distribution company Del Monte announced it would shutter two tin canning plants, laying off more than 800 workers. The first time this happened, the car started right back up, however the last three times it happened, the car just cranks. Oil Leaks From Engine Area Valve cover gasket leaks are common after 60,000 miles. what exactly is happening when your car vibrates when idle? I will take you through some of the reasons behind idle car vibrations. Trouble Starting and Rough Idle on Start Up. Dealing with high engine idle issues can be quite frustrating until you identify the cause of the problem. This is the final calibration point in the system other than the idle mixture screws themselves. It sat on driveway for a week during -10 temps. The shop might have to fiddle with the ETC tables a bit to calm down the movement of the throttle plate to regulate the idle. The AC compressor may not be pumping sufficiently at slower RPM's (revolutions per minute). The most likely reason for this type of problem is that your fan isn't working, but the reason, and the fix, will differ depending on the car you drive. What you describe is normal.