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Old 04-19-2011, 07:06 PM   #1
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Long crank time finally figured out. quick ? at bottem

After my jeep spent close to 2 weeks at the dealer, the long crank time before start up was finally fixed.
First thought it was the fuel pressure regulator....nope
It did Change the problem slightly though. The jeep would fire right up (80% of the time) after sitting over night, and would fire right up if it was previously running and was only off for 5-10 mins.
Other then that, a good 5 seconds of cranking before it would start.

So fuel pressure was not a problem according to them, so they started checking
things and replaced the crank pos sensor and other things with no change.

so this dealer sent it to a Chrysler dealer down the road because both owners are good friends.
There they found out the main computer was losing signal and (not sure exactly, forgive me if my terms are wrong) did not have a crank/start count.

so they replaced and it still cranks. I was getting MAD at this point.

ends up injector 4 was leaking, the raw fuel going into the cylinder would keep it from starting right away. which explains it starting cold because the fuel would evaporate or seep pass the rings and when starting it up then turning it off, the leak was slow enough that sitting for 10 mins would not keep it from firing up quickly.

now it starts perfectly, not sure if it was just the injector at fault or if the computer was part of the issue also. (not the mention replacing the fuel pump assembly originally did change the problem)

The dealer put new Spark plugs in (mopar plugs) and Im wondering if they are fine or if I need to upgrade to double platinum eventually, they are SP000ZFR5N
my jeep is a 2001 and uses a DIS.

thanks.

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2001 TJ 4.0L Automatic, D35/30, both hard and soft top, full doors,JKS quicker Disconnects, 31" discoverer ATR, American racing 767 offset 15" wheel. ProComp Genuine steel bumpers front and back. glass pack muffler, Rugged Ridge extended fender flares, 130w KC daylighters, motorcycle light for reverse lights. 86,000k miles (11-7-2012)
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Old 04-19-2011, 07:10 PM   #2
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My Jeep ran so bad on them 2 different kinds of them new fangled plugs that i had to take them back out and put in regular NGK's. They are about the only plug my Jeep will tolerate.

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Old 04-19-2011, 07:23 PM   #3
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My 2000 TJ does the same thing. But, it's just every once in a blue moon. How do you check if a injector is leaking??
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