2002 2.0 DTi in limp mode.
Long story, last thread here: http://www.astraownersclub.com/vb/sh...d.php?t=166804
Still got P0400 error code.
Looking at the size of the chamfer on the inlet manifold, I couldn't believe the O ring fitted would seal. I bought a new one, and a new steel gasket for the top, and was surprised to find the new O ring was the same as the old one.
I scrounged a fatter O ring and fitted that and the new gasket. That made it worse. The throttle had absolutely no effect until it had been running for about 30 seconds and even after that it would only rev to 1500.
I put the old O ring back today. I took the plastic cover off the end of the EGR so the linkage could be seen. One problem I've had is while I'm b***ering about with things, I can't rev it and be under the bonnet at the same time.
My Mum's visiting...
I revved the engine and got Mum to watch the EGR. It moved. We swapped. The EGR opens briefly as the revs drop which sounds about right to me. Being electrically operated with a stepper motor, I guess it would work properly or not at all.
I still need to change the upper inlet manifold for a permanent fix but the problems still there. Presumably there's a sensor somewhere telling the ECU there's an EGR fault, which there doesn't appear to be. Which sensor?
I'm wondering whether I should start looking at the exhaust side but can't really work out what I could be looking for.