Hey guys, i just bought a 96 XJ sport, automatic trans, 4 door, 2WD with a 4.0 HO. Actually i helped a friend buy it and now im def looking for a 4wd for myself i love these things.
Anyways, the car blew smoke and had a CEL. It was the upstream 02 sensor, so i replaced it and no more smoke and no CEL. I also replaced the air filter and spark plugs and ran some seafoam through the TB. It runs perfect and idles perfect when started up cold. But when it warms up it idles rough, runs and drives just fine when warm just idles rough. It sounds like its cammed and sounds like its sputtering/popping through the exhaust. I cant seem to find out what the problem is, im thinking maybe it needs the downstream 02? What are your guys' thoughts?
Anyways, the car blew smoke and had a CEL. It was the upstream 02 sensor, so i replaced it and no more smoke and no CEL. I also replaced the air filter and spark plugs and ran some seafoam through the TB. It runs perfect and idles perfect when started up cold. But when it warms up it idles rough, runs and drives just fine when warm just idles rough. It sounds like its cammed and sounds like its sputtering/popping through the exhaust. I cant seem to find out what the problem is, im thinking maybe it needs the downstream 02? What are your guys' thoughts?