Mechanics

CHEVY ROUGH IDLE

1988 Chevrolet Camaro

Engine Performance problem
1988 Chevy Camaro V8 Two Wheel Drive Automatic 38000 miles

I have a camaro with 38k miles on it, it have a complete tuneup done 800 miles ago (4yrs ago), the car now idles rough when warm and cold and under heavy acceleration the engine spudders and will backfire out of the intake, once it gets going it runs fine, what do you think the problem is or could be
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Mcampaiola
August 20, 2010.



Clean out the idle air control and EGR valve and test the throttle position and manifodl absolute pressure sensor-also check the fuel pressure

Rasmataz
Aug 20, 2010.
I have had everything you suggested checked and now the car idles real smooth and I expieriance no hesitation when cold, I do still have hesitation once the engine has warmed up and there is still some intake popping, the Mass Air Flow has also been cleaned

Tiny
Mcampaiola
Aug 31, 2010.