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1990 Jeep Wrangler Problems

Find the most common issues based on 1990 Jeep Wrangler owner complaints.
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Most Common 1990 Jeep Wrangler Problems

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, p...
Engine oil leaks from the valve cover gasket, oil pan gasket and timing cover gasket are common.
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 b...
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1 Known 1990 Jeep Wrangler Brakes Problem

Due to warped front brake rotors or variations in the thickness of the rotors, brake pulsations may develop. The best method to reduce pulsations is to use an "On the Car" brake lathe (as long as t...

2 Known 1990 Jeep Wrangler Drive Train Problems

Due to the design of the reverse gear system in the AX-15 manual transmission, it may block shifting into reverse one out of every ten attempts. An updated reverse gear is available if the concern ...
If the clutch is slipping when the clutch disc is 2/3 worn or if the clutch slave cylinder dust boot is torn, there may be insufficient clearance between the clutch slave cylinder and the clutch ho...

1 Known 1990 Jeep Wrangler Electrical & Lights Problem

If the fuel gauge is inaccurate or not working, it may because the fuel tank has bowed upward and interfered with, or damaged the sending unit (fuel level sensor). If the fuel tank has bowed, fuel ...

3 Known 1990 Jeep Wrangler Engine Problems

Engine oil leaks from the valve cover gasket, oil pan gasket and timing cover gasket are common.
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 b...
Ignition wire failures can cause a rough idle or intermittent engine misfire and there might not be a Check Engine light.

3 Known 1990 Jeep Wrangler Exhaust & Emissions Problems

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, p...
The outer exhaust manifold studs can break and cause exhaust leaks, commonly noted as a ticking type noise. The outer studs, clamps, and nuts will need to be replaced and are now being tightened ...
The throttle body may accumulate an oily, black residue in the bore and on the throttle plate causing hard starting or possibly stalling when coming to a stop. The throttle body should be cleaned d...

0 Known 1990 Jeep Wrangler Heating & Air Conditioning Problems

0 Known 1990 Jeep Wrangler Maintenance Problems

2 Known 1990 Jeep Wrangler Miscellaneous Problems

The tailgate hinges can corrode making it difficult to open the tailgate.
The hood support rod can rattle against the radiator driving over rough roads or when the doors are slammed. Installing a foam ring on the support rod can help to prevent the rattling.

1 Known 1990 Jeep Wrangler Suspension & Steering Problem

2.5L 4 cylinderIf the power steering pump pulley is not installed in the correct position on the pump shaft, the drive belt may make a chirping noise and sound as though it is coming from another c...

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Known 1990 Jeep Wrangler Problems & Complaints

The outer exhaust manifold studs can break and cause exhaust leaks, commonly noted as a ticking type noise. The outer studs, clamps, and nuts will need to be replaced and are now being tightened ...
Due to the design of the reverse gear system in the AX-15 manual transmission, it may block shifting into reverse one out of every ten attempts. An updated reverse gear is available if the concern ...
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 b...
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, p...
Engine oil leaks from the valve cover gasket, oil pan gasket and timing cover gasket are common.
Ignition wire failures can cause a rough idle or intermittent engine misfire and there might not be a Check Engine light.
If the clutch is slipping when the clutch disc is 2/3 worn or if the clutch slave cylinder dust boot is torn, there may be insufficient clearance between the clutch slave cylinder and the clutch ho...
The throttle body may accumulate an oily, black residue in the bore and on the throttle plate causing hard starting or possibly stalling when coming to a stop. The throttle body should be cleaned d...
Due to warped front brake rotors or variations in the thickness of the rotors, brake pulsations may develop. The best method to reduce pulsations is to use an "On the Car" brake lathe (as long as t...
2.5L 4 cylinderIf the power steering pump pulley is not installed in the correct position on the pump shaft, the drive belt may make a chirping noise and sound as though it is coming from another c...
The tailgate hinges can corrode making it difficult to open the tailgate.
The hood support rod can rattle against the radiator driving over rough roads or when the doors are slammed. Installing a foam ring on the support rod can help to prevent the rattling.
If the fuel gauge is inaccurate or not working, it may because the fuel tank has bowed upward and interfered with, or damaged the sending unit (fuel level sensor). If the fuel tank has bowed, fuel ...
Get a Repair Estimate
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RepairPal estimates are guaranteed at over 1,700 quality certified locations nationwide. Learn more
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