Starting problems - JeepForum.com

 
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post #1 of 12 Old 02-22-2013, 06:06 PM Thread Starter
unit199
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1994 ZJ 
 
Join Date: Jul 2009
Location: virginia
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Starting problems

I have a 1994 Grand with 4.0 having some issues with starting. If you go out and start the Jeep for the first time in days no matter what the temp is she will whirl right over and run. Then drive it to work and if you go out every couple hours and start it PERFECT if you dont and you go out after work and try to start it she will take 8 or 9 tries then it will kick over and it acts as if it is flooded. Take is home let it sit for a day and it will whirl right over and run smooth. Garage has checked pressure to fuel rail great pressure and run mutiple test nobody can tell me what to do, So I put it to the best you guys. I know someone out there will figure it out. Thanks

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post #2 of 12 Old 02-22-2013, 06:21 PM
ZeeJay1997
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Welcome to the forum

Fill out your Jeep info so we will know which engine you have.


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post #3 of 12 Old 02-22-2013, 07:41 PM
SpenceAK
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Might be your crank sensor. Has it died on you while driving? And these 8 or 9 tries is it turning over?
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post #4 of 12 Old 02-23-2013, 04:31 AM Thread Starter
unit199
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Location: virginia
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Thanks for responding The jeep is a 6 cy 4.0 The 8 or 9 times turning over yea it is trying to start always starts just sometimes time consuming. Never died while running. Once ya get her started she is good to go. Gas consumption has increased some used to get around 20 mpg now down to about 18. Thanks for the help.
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post #5 of 12 Old 02-23-2013, 04:43 AM
technophat
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Garage
I also have a '94 with a similar problem. I suspect the wiring to the pcm.

1997 ZJ Laredo, 4.0, 42re trans, 242 T-case
1994 ZJ Laredo, 4.0, 42re trans, NP231 T-case
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post #6 of 12 Old 02-23-2013, 03:54 PM
MustangFX93
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Also, unit199, you have your jeep listed as a WJ. 1993-1998 Grand Cherokees are ZJ's, WJ is 1999-2004, just a heads up
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post #7 of 12 Old 02-24-2013, 06:50 AM Thread Starter
unit199
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Thanks Mustang I changed it
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post #8 of 12 Old 02-24-2013, 06:54 AM Thread Starter
unit199
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Thanks Mustang I think I finally got it right
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post #9 of 12 Old 02-25-2013, 02:26 PM Thread Starter
unit199
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Location: virginia
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Well mechanic has checked out crank sensor not that so guess must look at the wiring now Hoping for a quick fix. Cant believe something that just happened out of the blue cant be a quick fix
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post #10 of 12 Old 02-25-2013, 09:05 PM
ZeeJay1997
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If it's not the crank sensor, then the next thing to do is unplug the o2 sensor and see if it helps your problem. The CEL will come on, but ignore it for now.

Unplug it and drive it, then let us know how it works out for you.


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post #11 of 12 Old 02-26-2013, 06:24 AM
ratmonkey
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I'd lean towardsa leaky injector or pcm capacitors myself.

When it's having difficulty starting, does the check engine light come on at first key on? It should do a three second self test light up.

'97 zj 5.2, some stuff, some other suff, and some things that even work sometimes.

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post #12 of 12 Old 03-06-2013, 04:58 PM Thread Starter
unit199
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Thanks all you guys for the info the mechanic finally got aroung to unplugging the q2 sensor and the jeep is starting better not completely fixed but much better I think I will replace them both Thanks again
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