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Have a 1990 4.0L Cherokee automatic transmission that is backfiring on acceleration or load (going up a hill). Runs great down hill (of course) and idles good. In order to go up hill I have to floor the accelerator and kick it down in low gear. It seems to work fine if I floor the accelerator...

Does anyone have a readily available, well written and illustrated, source of information for all of the sensors on a 1990 Jeep Cherokee 4.0L? Of particular concern is the O2 sensor and anything that would be related to an engine missing and backfiring problem when accelerating or climbing...

cj5 owners, or everyone... question New to the forum but owned jeeps since 1947. I currently have 3 (2002, 1994, and 1990). The 1990 is giving me some problem. Sometimes (50-60% of the time) when I am driving under an acceleration or load situation it starts to backfire and sputter. If...