95,662 miles on 3800 engine. Service engine soon light is on. During winter months noticed a chug while accelerating once in a while. I hooked up a computer scanner(Snap-On) found no codes. However, I noticed that the EGRvalve had no voltage output regardless of engine RPM. Now it is summer(A/C on) Severe chugging during acceleration during each and every accelleration. I suspect the EGR valve. But at the cost of $300 would like to be quite certain. Could a clogged catalystic converter cause this?
Monday, August 6th, 2007 AT 8:01 PM