Engine Performance problem
1997 Geo Metro 4 cyl Front Wheel Drive Automatic
i am working on a 97 geo metro lsi with a p0400 code that refuses to go away. Before I got the car the egr valve, the vacuum modulator valve, and the pair of solenoids under the modulator valve had been replaced with new from the dealer parts. I noticed the egr valve doesnt open under wide open throttle, in gear or in neutral(after engine is warmed up).I can open the egr valve with a vacuum pump and the engine stumbles. The solenoid that controls the egr has vacuum to it but doesnt open under throttle, however I can ground one of the wires to that solenoid and it clicks open and the egr opens. I have replaced a few vacuum lines that were damaged. I have the usual question. What now? Haha, what controls the solenoid? The pcm? Thanks for your help in advance.
have the same problem?
Wednesday, April 7th, 2010 AT 2:21 PM