Rough Running
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Joined: Mar 2007
Posts: 24
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From: Texas
Car: 1991 Iroc Z28 Camaro
Engine: 5.7L V8 350CI
Transmission: Stock
Axle/Gears: Stock
Rough Running
I have a 1991 IROC Z28 Camaro that I can't get running smooth...
It runs rough at Idle and surges when in drive, when you open the throttle it runs better but as soon as you let go it surges again... It has around 84,000 miles on it... When I ran the Diagnostics it just said EGR SYSTEM CODE I then cleared it and now it comes and goes... I pulled the PCV and it moves freely... Sometimes when taking off it acts like it's going to die right when you hit the pedal but then it gets going but runs real rough still... It runs pretty good cold but as soon as it gets warm it starts acting funny...
It runs rough at Idle and surges when in drive, when you open the throttle it runs better but as soon as you let go it surges again... It has around 84,000 miles on it... When I ran the Diagnostics it just said EGR SYSTEM CODE I then cleared it and now it comes and goes... I pulled the PCV and it moves freely... Sometimes when taking off it acts like it's going to die right when you hit the pedal but then it gets going but runs real rough still... It runs pretty good cold but as soon as it gets warm it starts acting funny...
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Joined: Jun 2006
Posts: 423
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From: Lubbock, Tx
Car: 1991 Camaro Z28
Engine: L98 5.7 350 TPI
Transmission: Brand New (again) 700r4
Axle/Gears: GM 10 bolt 7.625 W/ TrueTrac 3.23
I thought they stopped making IROCs in 90..... I could be wrong though.
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Joined: Jan 2006
Posts: 348
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From: So.MD
Car: 92rs
Engine: 350
Transmission: 350
Axle/Gears: 3.73/Moser 12bolt
mine was doing something similar but did not throw a code.I unplugged the MAF and it runs smooth . Don't know if it is the MAF or the relay as I just found this out and have not replaced anything yet .
Do not know if this helps but it sounded familiar to my problem cept the code.Good luck
Do not know if this helps but it sounded familiar to my problem cept the code.Good luck
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