Rough Idle, down on power, poor fuel mileage

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02-09-2005, 06:12 PM

My90Iroc

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Location: E. Patchogue, NY

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Car: '90 Iroc

Engine: 305 TPI

Transmission: 5 spd

Rough Idle, down on power, poor fuel mileage

Car is running pretty crappy. It's idling rough and running rich (I can smell it and gas mileage is down a bit). I thought it was a specific injector and replaced it. It seemed better but is now running like crap again.

I'm not sure if this could be an EGR valve problem?

I'm not to sure where start looking again so suggestions would be appreciated.

Thanks.

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02-09-2005, 09:52 PM

anondude13

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Re: Rough Idle, down on power, poor fuel mileage

Quote:

Originally posted by My90Iroc
Car is running pretty crappy. It's idling rough and running rich (I can smell it and gas mileage is down a bit). I thought it was a specific injector and replaced it. It seemed better but is now running like crap again.

I'm not sure if this could be an EGR valve problem?

I'm not to sure where start looking again so suggestions would be appreciated.

Thanks.

Telltale signs of a bad EGR are as follows. The car idles great, but tries to stall under light load, but is fine at high load. In your case it's either fuel or spark.