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Unread 12-21-2011, 09:35 PM   #1
hdrocknroll
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1995 ZJ 
 
Join Date: Dec 2011
Location: Flint, MI
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Cutting out from stop only

95 4.0 When I accelerate from a dead stop, engine is cutting out, if I push down on the accelerator, real easy it does not do it.
Oh yeah, it doesn't do it when it's cold either, only after its warmed up.
Once I am rolling 20 miles an hour I can go WOT, and it won't cut out.
What is causing this ?
I have a new crankshaft position sensor that I am going to install in the next couple of days.

New parts
spark plugs
plug wires
camshaft position sensor
rotor
distributor cap
other irrelevant parts.

I assume it could be the PCM
Is it the crankshaft position sensor ? Could it be the throttle position sensor, or ************what ??
Your help will be greatly appreciated

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[QUOTE=rooster51;13297693] Whats the worse that can happen? Your jeeps already broke.



[/QUOTE]
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Unread 12-21-2011, 10:29 PM   #2
Virmagicus
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Quote:
Originally Posted by hdrocknroll View Post
Oh yeah, it doesn't do it when it's cold either, only after its warmed up.

Other possibilities are O2 sensor,ignition coil, slight chance on the TPS.
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Unread 12-21-2011, 11:52 PM   #3
hdrocknroll
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So! can I check ,coil with multimeter? If so,exactly how?
Please and thank you
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[QUOTE=rooster51;13297693] Whats the worse that can happen? Your jeeps already broke.



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Unread 12-22-2011, 08:52 AM   #4
ZeeJay1997
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I would not suspect the PCM for this problem nor would I suspect the CPS, although stranger things have happened.

I suppose, since you didn't mention it, that the CEL is not on and that you have tried retrieving codes with key sequence (on-off without starting three times in less that 10 seconds, stop at on) and found no codes. Absent of these, you're most likely looking at a secondary ignition or fuel delivery problem. I would look for a large vacuum leak.

I'm thinking you may have an intake leak that is sealing up when it gets hot.

To check coil:
Primary 0.95 - 1.20 Ohms
Secondary 11,300 - 13,300 Ohms
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Unread 12-22-2011, 08:57 AM   #5
ZeeJay1997
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Afterthought, Disconnect O2 sensor and see if problem goes away
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Unread 12-22-2011, 01:18 PM   #6
PolkaPower
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Sounds just like when my TPS was on it's way out. I went to pass in the highway and when I hit the gas nothing. I had to lightly feather the pedal to get it going again. Then stopped at lights it would want to die.
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Unread 12-22-2011, 09:22 PM   #7
hdrocknroll
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Thank you all for your input
the only trouble code I had was camshaft position sensor, I replaced that but it didn't seem to make any difference, but after replacement the code was gone
I was skeptical whether or not the new crankshaft position sensor was going to fix the problem
Man I am so glad to have this fixed
I got out there today and put in the new crankshaft position sensor, went for a long drive, and stop and go, and had no cut out.
I had trouble positioning the new one in the cramped space to get it back in the hole, after I dropped it about five times, I got my little flexible claw grabber tool, clamped onto the wire, then positioned sensor up where I could grab it with my other hand, and get it down in the whole. 3 feet of extensions and a swivel got the bolt out and back in
I purchased this sensor from rock auto parts, for $34, I got the part in two days.
FYI, there are two different crankshaft position sensors for a 95 4.0, the two bolt sensor is for manual transmission, the one bolt is for my automatic transmission
__________________
Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


[QUOTE=rooster51;13297693] Whats the worse that can happen? Your jeeps already broke.



[/QUOTE]
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Unread 12-23-2011, 11:19 PM   #8
hdrocknroll
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I did a lot of running around today here and there not one baulk , bark, stumble, or hesitation.
So the crankshaft position sensor was the culprit
__________________
Always !! Keep A Firm Grip On Your Tool !!

Watch Out For The Air Hose Gone Wild!! Or Wear A Cup,: True Story


[QUOTE=rooster51;13297693] Whats the worse that can happen? Your jeeps already broke.



[/QUOTE]
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Unread 12-24-2011, 09:57 AM   #9
darrenz
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also is what cured my problem....no check engine light to tell me that, but that was it!
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