Engine Performance problem
2001 Chevy Express V8 Two Wheel Drive Automatic 330000 miles
My van all of a sudden started stumbling and showing a loss of power (only at mid-upper rpms). Check engine light came on, so I took it to autozone and they gave me p0401. I have researched this and researched this, changed out the egr valve. I have read about vacuum lines being clogged-I believe mine does not run on vacuum. I read about carbon build-up--I saw some, but only around outside edges, didn't seem bad to me. I am guessing that it might be the sensor for the egr valve, but don't wanna play change this, change that. I have a fluke voltmeter, if it can be used to check the sensor, but don't know how to check it. This van has 330k on it, and I want it to see 1000k because I am a poor floorman that cannot afford a new van; so I do my very best at fixing/maintaining it. I have some training from UTI also, but like I said I am a floorman now. Your input is greatly appreciated.
Monday, October 18th, 2010 AT 1:06 PM