Question about 2005 Jeep Wrangler
This could be a blocked exhaust. Unscrew and remove the upstream O2 sensor (the one BEFORE the catalytic convertor) and then drive the jeep and see if the problem is resolved. If so then you have a blocked exhaust, probably caused by an internally collapsed catalytic convertor.
It could be a fuel pressure issue which is diagnosed via a fuel pressure test. You could, as a long shot, fit a new fuel filter and see if that resolves the issue, however, a worn fuel pump could also be causing it.
It could also, if the problem only occurs once the jeep has warmed up, be a problem with the upstream O2 sensor.
Very best regards
Posted on Jun 09, 2008
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Posted on Jan 02, 2017
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