Question about 1992 Jeep Wrangler

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Engine races, clutch won't engage

I have a 1992 YJ with 260000 kms on it, original clutch. For the last few months the engine will randomly race/surge ahead of its own accord if I'm at a stop with the clutch engaged - I have to simultaneously brake to avoid jumping binto the car ahead. In addition, if I am in neutral and go to put it in first gear it just won't budge unless I pump the clutch a few time. A few times I have had to turn the jeep completely off and when I restart the gears generally mesh properly.

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Sounds like you clutch cylinders are acying up. chk the the clutch master cylinder fluid level. If it is low, you have a leak. If it's full, Your master cylinder is bypassing internally and should be replaced with another unit. new or rebuilt.
To do it right, the slave cylinder should be changed out also. You'll be replacing it soon after anyway.The thing is, There are rubber cups that wear out or the cylinder bore gets rusty and cause oitting the cups can't seal. They aren't very costlyin relation to having your clutch choosing when to engage an either hit someone or run someone over. Good luck annd I hope your ptoblem is solved.

Posted on Jul 24, 2009

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The clutch's master or slave cylinder have worn out but you may want to suction the old brake fluid out and replace with new and try. This master cylinder will be near the one for the brakes but smaller and uses the same DOT3 fluid.

Posted on Jul 24, 2009

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Pushing the clutch pedal it to disengage the clutch, so your description is confusing. But if a car creeps when the clutch is down, you must immediately adjust the clutch, or you will ruin the transmission. However I believe you have a hydraulic clutch linkage, so the slave or master cylinder could also be bad. Peel back the rubber boots to check for leakage.

Posted on Jul 24, 2009

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Hey i had that exact same problem with my 92 YJ. you nailed it perfect, but i had my friend who is a great mechanic and all i did was add a bit more clutch fluid and i bleed the clutch line. i just had an air pocket in it, so that why the clutch wasn't fully disengaging and was jumping ahead when i was stopped in traffic with it in gear, hope that helps if you haven't already figured out your problem. good luck

Posted on Sep 22, 2009

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