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Old 06-16-2006, 07:10 PM   #1
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Unhappy Cranking Sound

Hey all! I have a 1999 jeep wrangler. Lately when I've had to sit in traffic for long periods of time, my jeep will start to make this sound that sounds like a crank or a sputter coming from the engine. Once when I pulled off the highway, the harder I accelerated, the louder the noise became and it drove sluggish. I will turn the engine off and let the jeep sit for awhile and will jump back out into the traffic after 10-15 minutes have passed. The jeep will run fine for awhile, but if it idles in traffic for another lengthy period of time, the noise will return. I've never let the noise continue for a long period of time for fear the jeep will stall out or something. Could anyone give me some suggestions as to what might be the culprit. I have taken it into the shop before and basically they have all told me since they can't hear the problem themselves they can't diagnose the problem. They will let the jeep run for a period of time, but the noise will never appear for them. I once thought it was related to a problem I had with my a/c. Water would basically back up into the passenger side floor. I have since had that problem fixed. Afterwards, I didn't hear the cranking noise for the longest time, but lately it has returned. Any advice would be most appreciated. Thank you.

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Old 06-16-2006, 07:41 PM   #2
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Is your A/C running when it happens? It sounds like it could be the clutch or maybe even the cooling fan clutch.

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Old 06-16-2006, 08:56 PM   #3
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Cranking sound

Yes, usually I have my a/c running. As with today, I would alternate between using the a/c and turning it off. It scares me to run the a/c constantly, so I try to turn it on for a few minutes here and there. Do you know if the clutch or the cooling fan clutch would be something very expensive to replace? Thank you for your reply.
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Old 06-16-2006, 09:00 PM   #4
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I agree with above ^^^^ .. I had my AC on one day.. and yeah, it sounds like a spooling thing and then it stops, then goes again, stops, goes again, etc.. And I looked at it under the hood, it is the clutch on it.. if you watch it, it will spin (the spooling noise) then you can see it stop.. I didn't really think anything of it.. I don't use my AC much, last time I did use my AC I didn't hear it.. This might be a retardedly long shot.. But try starting your jeep with the AC OFF. Then turn it on.. Cause when mine did it.. I started the jeep with the AC on.. but last time I used the AC I started my jeep with it off, and I didn't hear it.. But I've only used the AC those two times.. I have pretty much had the top down and doors off since I bought the jeep 2 months ago
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Old 06-16-2006, 09:01 PM   #5
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I have no idea about the A/C or how much that would cost, but I believe the cooling fan should only be about $25 or so. Unless, they have gone up drastically since I bought my last one.

If it doesn't do it with the A/C off, then I would start looking there. It sounds like that is your problem, from what I am getting out of it.
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Old 06-16-2006, 10:18 PM   #6
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Does it only happen with the A/C on? If so, it sounds like your clutch on the A/C compressor is going out. May not hurt to have a trusted mechanic look at it for you. I know, they are scarce, but they are out there. Ask some of your friends, usually a good mechanic is found by reputation.

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