Mechanics

GEO TRACKER SENSOR PROBLEM

1994 Geo Tracker

My exhaust manifold is glowing red, after short periods of driving.
it is NOT my catalytic convertor, I have removed it and I have excellent exhaust flow, it is running lean, I do not know why, my question is, how can I fix the problem I have of it running lean?
i have no cat, straight 2 1/4" exhaust to a cherry bomb, so there is no restriction. It has a new valve cover gasket and new intake gaskets. Not sure what it could be, EGR valve maybe?
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JJones88
September 6, 2007.



No vacuum leaks? Has the o2 sensor ever been replaced?

Tiny
Jack42
Sep 6, 2007.
No, there are no vaccuum leaks, I dont think the o2 sensor has even been out of it. They want $160 for a new o2 sensor. Would it be worthwhile to pay $40 for a used one?

Tiny
JJones88
Sep 6, 2007.
No, they have reactive material in them and deteriorate from the first time the engine is started

Tiny
Jack42
Sep 6, 2007.
02 sensor is fine, but there is a crack in my header I have found, beside the o2 sensor, could it be bringing in false air?

Tiny
JJones88
Sep 11, 2007.
Yes, it is important that all exhaust leaks be fixed

Tiny
Jack42
Sep 11, 2007.