1994 geo tracker

1994 GEO TRACKER
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JJONES88
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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?
Sep 6, 2007 at 7:30 AM
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2CARPRO JACK
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No vacuum leaks? has the o2 sensor ever been replaced?
Sep 6, 2007 at 7:46 AM
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JJONES88
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[quote:ff2dce7bcc="2CarPro Jack"]No vacuum leaks? has the o2 sensor ever been replaced?[/quote:ff2dce7bcc]
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?
Sep 6, 2007 at 1:32 PM
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2CARPRO JACK
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No, they have reactive material in them and deteriorate from the first time the engine is started
Sep 6, 2007 at 4:40 PM
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JJONES88
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[quote:182c028793="2CarPro Jack"]No, they have reactive material in them and deteriorate from the first time the engine is started[/quote:182c028793]

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?
Sep 11, 2007 at 11:15 AM
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2CARPRO JACK
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Yes, it is important that all exhaust leaks be fixed
Sep 11, 2007 at 12:08 PM