Engine Performance problem
1989 Chevy S-10 6 cyl Two Wheel Drive Automatic 71,000 miles
My 89 Chevy S-10 has 71,000 miles.
The engine runs good when it is cold, but
when the engine warms up it seems that the idle lowers and the engine starts to run rougher than when I first start it up.
The engine begines to run so rough that it acts like it's going to stall but does'nt. I've replaced the Air idle controll valve, new ECM, new plugs and wires and an O2 sensor. The EGR valve seems to be OK. I've had a vacuum check done on the valve (EGR) and it seems to be operating properly, but i'm unsure if it could be bad. When I hook up a vacuum gauge to it the idle does change. If I do it while it is could it starts to run as it would when it warms up. What would be the problem is there something that I might be over looking? What might the problem be?
have the same problem?
Wednesday, April 22nd, 2009 AT 4:19 PM