Question about 1989 Jeep Comanche

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My 4.0 starts great when cold, but is very hard to start when hot. Any ideas?

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Sounds like the electronic module needs to be replaced. Unplug the old one take out the mounting screws get a new one at the auto parts place plug it in replace the mounting screws and it should be ready to go it's not hard

Posted on Jun 27, 2009

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I don't know if you are talking about outside temperature or engine temperature. If engine temperature-it could be the ignition coil or coilpak or fuel pump. If outside air temp- then the cold start circuit acts like a choke and the engine is too lean to start good when the cold start circuit does not work in hot weather. There is a temperature sensor in the air bonnet for incoming air.

Posted on Jun 27, 2009

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SOURCE: hard starting

try cycling the key on and off 5-6 times before cranking. let me know what happens

Posted on Dec 09, 2008

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