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99 grand cherokee 4.0 hard start.

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Old 04-25-2011, 01:36 PM
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Default 99 grand cherokee 4.0 hard start.

Just got a 99 grand a few months ago 156k on it runs great. But latly its been getting harder to start. I guess i should say it cranks longer. And getting worse. What could this be?

Thanks
J
Old 04-26-2011, 02:44 PM
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Bump anybody?? Or please direct me to a previus thread if this has been discussed.
Old 04-26-2011, 09:59 PM
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Mine does this as well ... there was a service bulletin out for "long cranking periods" or long cranking times.

There was a series of things to check. Many of which involved the fuel pump. They would lose pressure internally or the seal around them would lose pressure.

I replaced mine b/c a friend said that had to be it. Well, it wasn't. He now is telling me a leaky injector. There is a thread on here somewhere for leaky injectors as well.

Keep digging.

The service bulletin does have a series of leakdown tests at the rail to see if it's losing pressure.

Mine has been doing it for 3 years ... I did the pump 6 months ago. So, hopefully I figure mine out soon as well.

Good Luck if any of that helped.
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