Question about 1996 Jeep Grand Cherokee

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My 96 jeep runs cold,especially first thing in the morning and tends to buck and jump but idles fine. charlie I bought the leep on friday and it has been sitting for a least a month. About 20 miles down the road it began to buck and jump. With only a 1/4 of tank of gas in it I decided to add a little more. I drove a little bit further and added some STP in the gas tank thinking it may have some water inside. But the next morning that it ran very cold when I cranked it.

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  • cjjenkinsjr Feb 22, 2009

    Thanks for that piece of information but it has nothing to do with my problem. The Jeep runs cold in the morning, as in the motor runs hard. And my check engine light is on

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Pour a bottle of dry gas into the tank. Use middle or top grade gas. If it sat for a month, there's condensation in the gas tank. The plugs will get fouled. The higher octane gas will help burn the deposits off the plugs. It probably could just use a good tuneup, once the gas gets run through. For winter, run 5W-30 oil. for summer 10W-30. A bottle of DuraLube every 50,000miles will help it run smoother.

Posted on Feb 22, 2009

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Hmm, it definitely seems you have a problem with your heater or maybe your tires. Did you under your jeep and check the tires? And try taking a look at your heater. You might have a crack somewhere also.

Posted on Feb 22, 2009

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Prviouse owner seems to have had a water pump problem and removed the thermostate, causeing the engine not to reach operating tempture in time. Do you have heat? does it take a long time to creat heat on a city drive and no heat on the highway? estimaternotfree@yahoo.com

Posted on Feb 22, 2009

  • estimaternot Feb 22, 2009

    check your thermostat, it will be cold because its a cold start,

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