Engine Performance problem
1993 Chevy Truck V8 Two Wheel Drive Automatic 286000 miles
My truck has had a low idle, also upon light acceleration, and around 1200-1800 RPM, it has some hesitation. It runs fine other than that. I changed the idle air sensor at the throttle body, now it seems worse. Had trouble starting the truck this morning. What else could it be and why would it get worse after changing the IAC? Thanks.
The first thing I would've done is change the fuel filter and checked the fuel pressure that is what it's starting to sound like.
July, 10, 2009 AT 10:34 PM
I changed the fuel filter, I have since changed the MAP sensor, O2 sensor, plugs, wires, cap, rotor, EGR valve solenoid, coil, IAC, TPS. I took it in to a shop, they said it's my distributor that is making the timing jump around. So I guess I'll change that next?
July, 10, 2009 AT 10:58 PM
That could be true, and it may be a possibility, but you haven't mentioned you check the fuel pressure?
July, 15, 2009 AT 5:10 PM
Changed the EGR valve, runs like a champ now.
July, 15, 2009 AT 5:21 PM
A dirty EGR Valve will cause a e radical idle, but I just assumed by your statement " I have since changed. EGR valve solenoid" I assumed that you had already looked at that, at any rate, I'm glad you solve the problem and thanks for the info I will pass it on.