MY EXHAUST MANIFOLD IS GLOWING RED AFTER SHORT ...

1994 Geo Tracker

Tiny

JJones88

September, 6, 2007 AT 7:30 AM

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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5 Answers

Tiny

Jack42

September, 6, 2007 AT 7:46 AM

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

Tiny

JJones88

September, 6, 2007 AT 1:32 PM

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

Jack42

September, 6, 2007 AT 4:40 PM

No, they have reactive material in them and deteriorate from the first time the engine is started

Tiny

JJones88

September, 11, 2007 AT 11:15 AM

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

Jack42

September, 11, 2007 AT 12:08 PM

Yes, it is important that all exhaust leaks be fixed

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