Automobile / Jeep / Wrangler

Jeep Repair Questions and Answers

Question: 1999 Jeep Wrangler mileage: 120,000. Here's a bizarre one. When I drive my Jeep on long trips, after about 120 miles, the oil pressure gauge starts acting erratically. The Jeep runs fine but the oil pressure gauge pulsates randomly between Zero and Forty. It only does this on the highway and after about 2 hours of driving. All other gauges seem OK it's just the oil pressure. This gauge drops causes the "check gauges" light to come on.

Answer: You either have a faulty gauge in the dash or internal engine oil pressure problems. To check this, connect a temporary mechanical gauge to the engine. Drive the car on the highway as you did when the problem occurred. Watch the mechanical gauge and if it does not fluctuate, then you know you have a faulty gauge or sending unit. If it does fluctuate, you have internal engine oil pressure problems.

Question: 2001 Jeep Wrangler mileage: 75,000. I read about the "knock sensor" that you have alluded to in answers to other questions. Does my model have one of these? I am experiencing extreme knocking when I use anything but premium gas! This has been going on for a long time now, but has really only hit home recently with the rise in gas prices. Would the knock sensor be the only thing that could explain this problem, because I have asked my mechanic before about it and they didn't mention this?

Answer: Your car may not be equipped with a knock sensor. Check the EGR valve. If it is not functioning properly, it can cause engine pinging.

Question:  2002 Jeep Wrangler  mileage: 83,000.  My jeep wrangler (02) was idling then shut down, it will not start. The engine turns over but will not catch.  I am guessing it could be the idle air sensor.

Answer:  You more than likely need a crank angle sensor.

Question:  1999 Jeep Wrangler mileage: 90,000.  My front right brake leaks brake fluid, and my brakes will not work.  What should I do?

Answer:    Locate the source of the brake fluid leak and repair.  If the brake pads have gotten wet with brake fluid, they should be replaced.  Check the other three corners of the car’s brakes to make sure they are in good shape.  Finally, yet importantly, bleed the air out of the system.

Question:  1998 Wrangler mileage: 85,000.  My seat belts are sticking in the retractor mechanism.  They stay out, not retracting against my chest when I drive.  Can I fix something like this?  Is it a matter of opening retractor and lubricating?

Answer:   The seatbelt retractors are not serviceable.  The entire assembly must be replaced.

Question:  2001 Jeep Wrangler  mileage: 95,000.  The tachometer on my Jeep shows between 2-3 (I don't know what it means exactly) and is running too high (fast) during idle speed.

Answer:    Your car is equipped with a computer controlled engine management system.  An independent auto service center can scan your computer for fault or error codes.  The information should pinpoint the malfunctioning components.

Question:  I have a 1997 Jeep Wrangler mileage: 95,000 automatic transmission, that gets between 18-20 miles per gallon. Is there any way to improve the mileage?

Answer:  Your Jeep is equipped with a computer controlled engine management system. The fuel mixture is constantly monitored and adjusted for optimum mileage and performance. The only way to improve mileage is change driving habits i.e., slow starts, constant speeds etc. Keeping your Jeep in top running condition also helps.

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