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A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
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  Jim Grant's Tech Tips

'94 Jeep Wrangler, Stalling Problems

Q: I have a ‘94 Jeep Wrangler 4.0L with an automatic transmission. At cold start up it revs to fast idle then as it comes down to regular idle it stalls out. Restarting it may or may not stall again. When it reaches operating temperature, it runs fine. The plugs, ignition wires, rotor and distributor cap were replaced at 2k-2.5k miles before stalling started and they still look good. Fuel pump pressure is normal. This vehicle has 143k mile on it and has given excellent service.

A: Take the air inlet hose off where it enters the throttle body and take a look at the throttle plates. It is likely that they’re dirty and have a build-up of carbon deposits. That is the most common cause for stalling that we see in the shop for your vehicle. Sometimes all it takes is a good cleaning to cure the stalling problem. There is an idle speed setting on your Jeep, but to check and/or perform this service step requires the use of a computer scan tool for your vehicle. If the cleaning doesn’t help ask a repair facility to check and reset, if needed, the minimum idle speed on your Jeep.

 
     
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