1990 Jeep Wrangler Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Jeep Wrangler
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1990 Jeep Wrangler ProblemsDrivability Issues Due to Faulty Throttle Position Sensor
The throttle position sensor (TPS) may fail causing intermittent drivability problems like hard starting, stalling, and/or hesitation when accelerating. A failed TPS will require replacement, proper diagnoses should always be performed before replacing any parts.
Some models are susceptible to rear main oil seal failures in dirty or dusty conditions. As dirt and dust collect on the oil seal, the abrasion wears through the sealing surface. A spacer is used between the bell housing and engine that has a small slot in the 12 o'clock position. Filling this slot with RTV silicone and cleaning the seal area can help prevent damage to the seal.
1990 Jeep Wrangler Questionscan a 4speed auto trany go in it? what year will work? (1 answer)
I had a machine shop check and shave the heads , I also replaced the intake manifold gasket and head gaskets and still get water in the oil. this jeep has the AMC 304 motor in it . any ideas?