Auto Repair - Roadshow forum

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99 Jeep Cherokee Sport Hard To Start In Cold.

by Love/HateJeep99 / December 11, 2007 9:03 PM PST

My Wifes 1999 Cherokee Sport Has been reluctant to start only when cold. In Order to get it started we need to pump the gas and then it will start with a big blast of Black smoke out the tail pipe. If i do the old Two foot drive method and drive it for a few hundred feet it stays started and seems to run fine. I've replaced the Fuel pump mudule, Plugs and wires. I evan found a broken Vacuum line. After all that it's still acting the same. It seems Once it's in Drive it comes alive! Any Ideas? TPS?

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Is it fuel injected? I've never known...
by Jack Ammann / December 15, 2007 2:33 AM PST

..."pumping" the accelerator pedal added fuel to the engine on fuel injected vehicles. The Enrichment System on your vehicle is not working while in the "START" mode. This is the equivalent to the choke and/or accelerator pump on a carbureted engine. And frankly, I don't know the whole process of fuel enrichment, either for starting or accelerating, on a fuel injected engine. If it were my car, I'd take it to the dealer as they have all the test gear for the proper operation of fuel injection.

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Re: 99 Jeep Cherokee won't start up in the cold
by drewski97 / December 15, 2007 5:05 AM PST

I would try to let it warm up when it starts or take it to the dealer and tell them the problem

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99 cherokee sport HArd to start in cold.
by Love/HateJeep99 / January 21, 2008 10:29 AM PST

OK, This may not be the cure for this problem every time but, this is what fixed my Problem. Are you ready? It's pretty complicated! I changed the Battery. I know it's simple, I saw this as a possibility on another furum. Tried charging it but it was still slow turning over. So when I switched out the battery it started right up and stayed running on it's own. No gas pedal, no warming up, no having to drive a couple hundred feet. I know it sounds crazy but I guess you need a certain amount of juice. So if you have this problem try another battery even if it's out of another car just to test before you spend the money. I love when I figure it out myself, I'm pretty stuborn and hate to think of paying someone else to do what I can do for free.

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99 Jeep Cherokee Sport Hard To Start In Cold.
by j5erskine / December 15, 2008 5:23 AM PST

sounds like you have a bad iac (intake air control). it is a rather common problem on the 4.0 but comes with a little cost. its right on the throttle body and can be changed rather easily. try this, to find out if thats the problem instead of pumping the gas before trying to start it just put your foot on the throttle to just barely open the throttle plate and then start the car. if that works the iac is probably your problem.

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