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2008 audi a4 2.0 rough idle which appears to be a pattern. Seems like it will stall, then it continues to run. Check engine light came on after driving under these conditions. While driving, screaching noise came from front of car. Engine oil is low, but still have 900 miles before next oil change. No oil pressure light is lit. Sounds like a misfire, but with a strange pattern. Seems to run better when you give it gas, but overall the car is dogging. What could the problem be and how can it be fixed?

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3 Answers

Stalling at low idle


I don't know this specific car. But, if it has one, check your Idle Air Valve. This can cause the engine to stall. If you can hold the gas pedal and the engine will continue to run until you let off the gas, it is likely the IAV. It will not necessarily cause the engine to run rough. That could be a number of things like spark plugs, wires or dirty injectors. It could also be a compression problem. Is the check engine light on?

Mar 04, 2014 | 1995 Dodge Intrepid

1 Answer

My 2007 Chevy Silverado loses power when I come to a complete stop no engine lights appear but if I turn off the truck the problem goes away for awhile .


Loss of power, but no mention of rough or inability to idle (including stalling). If those additional symptoms are part of the problem, check for a vacuum leak to the intake. Listen for hissing or sucking noises near air hoses. Look for loose, cracked, or broken air hose connections. Check PCV valve...Cheap to replace, could be sticking, then loosen after truck sitting with engine off. A vacuum leak will not give any light indications, and vehicle will seem to run normal when applying gas, but will want to stall or run rough (or want to stall) when at idle or sometimes when taking foot off gas when slowing down.

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1 Answer

Rough idle, rough in drive


Is the check engine light on ?
Have you checked the computer for trouble codes ?
You could have one bad spark plug even with only 30k on it.
Problem could also be a dirty injector.

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1 Answer

1989 ford stalls when idling ,runs rough at idle


Check for any trouble codes in the engine computer, and have the fuel pressure tested. If it is throttle body injection. observe the spray pattern of the injector when it pulses. You should see a cone pattern of the fuel spraying down into the intake. If it drips, or appears anemic, the injector might be partially clogged. Try some injector cleaner in the gas tank.

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1 Answer

When idleing once in a while it starts running rough and shaking truck, 1998 k1500 350. no engine light. when i gige it gas it smooths right out. engine seems like its a little louder than normal.


Here is the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.

To correct this problem Buy a can of throttle valve cleaner (it is made by CRC) from the local auto parts store, NEVER USE CARB CLEANING SPRAY, IT DESTROYS THE ANTI-STICK TEFLON COATING, spray it into the air intake through the throttle body of the engine until you have used about half the can, you will need to hold the idle up while you do this, it will try to stall, after this shut the engine down and disconnect the Negative (-) battery cable for 5 minutes. The intake is now clean, if you continue to have the idle speed control problems you may need to seek the help of a professional.

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1 Answer

I bought a second car for utility use; B6000, 1994, p/u, standard trans. Only when starting and running when the engine is cold, it runs very rough and difficult to idle. At normal operating temperatures...


a coolant tempurature sensor will make it run to rich if it is bad. run rough at idle, and produce black smoke, engine may stall out. it also causes retarded timing, slow idle speed, cold hesitation or stumble, poor fuel milage. good-luck!! if light is on check for problem code. this will guide you in the right direction. if no scanner, any auto parts store will scan for free. repost if need be. have a good day!!

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You could have a bad air flow sensor. Do you also have a lack of power??

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3 Answers

Rough idle stalls at low rpm's


check your transmission fluid,the motor will stall when fluid is low

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