Engine Performance problem
2002 Chevy Tahoe V8 Four Wheel Drive Automatic 77000 miles
My tahoe was doing the rough idle/ nearly stall problem and threw a p0170/p0174 code, so I replaced the MAF sensor. After installing the sensor it also threw a p0300 code. I cleared all codes and disconnected the battery for a couple of minutes. Since then I haven't noticed a rough idle except when below freezing outside untill the engine warms up. There have been no new codes. No vacuum leaks that I can find. The current problem is horrible gas mileage. Like 8 to 10 highway. Fuel pressure is good, new plugs and wires so I am suspecting egr valve (I have seen that on 2 previous GMs Ive owned) I removed the intake cover but can't find the egr valve anywhere. Where the heck is it? 5.3L VIN code T
have the same problem?
Tuesday, March 30th, 2010 AT 8:05 PM