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Posted on Jun 12, 2009
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Check engine light, Idle rough

Idle rough and check engine light comes on after a few minutes of idling.

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  • Master 321 Answers
  • Posted on Jun 12, 2009
Anonymous
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Joined: Jun 12, 2009
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Check the throttle body inside .
look and see if its all black around the butterfly inside there.
thats the throttle thing that opens and closes with the gas ped being pressed.
if its all caked up around the plate then spray it clean and wipe with a clean rag it should be nice and clean in there and then change to super unleaded fuel only.put a obd2 comp on the car and give me the codes so i can help you further.autozone can get and give you the codes for free.

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Car will not come out of park and idle is very rough then idles smoother after few minutes

Check your fluid levels starting with the transmission fluid and then the oil.
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your idle valve may be dirty or needs replacing would check this as it controls idle. sits on the intake with wires coming out of it.
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clean the throttle body, especially around the butterfly.
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When first starting the car the service light comes on and then goes off after 5 minutes. When the car is idling the rpm's vary from 900-1000 and seems to have a slightly rough idle.

Deanna, have you checked for vacuum leaks yet? A simple leak can cause this. Check your air filter as well. Bad wires and plugs can also cause a rough idle. You need to catch your check engine light on and have your vehicle scanned for codes.
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Idles rough when first starting in morning. plugs replaced, new throttle body, two new ignition coils. After a few minutes rough idle goes away. Sometimes causes check engine light to go on. Not consistent...

Sounds like you might have a bad engine coolant temperature sensor. I would have the codes retrieved from the computer to see what sensor/s it is seeing a problem with.
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Check engine light is on: engine idles rough

IT SOUNDS LIKE THE IAC (IDLE AIR CONTROL) MOTOR IS BAD OR GOING BAD, BUT THE QUICK SOLUTION IS GO TO ANY AUTO ZONE,OR ADVANCE AUTO PARTS STORE, AND THEY WILL CHECK IT FOR FREE,& TELL YOU WHAT SIGNAL CODE MADE THE CHECK ENGINE LIGHT COME ON, I WOULD DO THAT JUST TO BE FOR SURE, BECAUSE THERE ARE A FEW OTHER THINGS THAT CAN CAUSE IT AS WELL,SUCH AS MAF SENSOR DIRTY,OXY SENSOR GETTING A BAD READING,ETC.
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IDLE PROBLEM

Here are some of the causes of surges, 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, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

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Rough idle and check engine light concord

Check your EGR valve and your IAC Idle Air Control valve make sure both are functioning correctly
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Engine runs rough after about ten minutes /idles really low

Just trowing some suggestions out there, but, I would check the idle air control valve (solenoid) or the throttle position sensor. If they check out then my last guess would be the map sensor or the vaccuum to the map sensor. Hope I was able to help. Best wishes.
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