Fuel pump or crank position sensor? - JeepForum.com

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post #1 of 22 Old 08-11-2015, 07:27 PM Thread Starter
Lsuzj
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Fuel pump or crank position sensor?

With full tank it was parked for 2 days. My wife leaves for work and makes it 1/2 mile before fuel gauge drops to E and jeep dies. I have 3.19v at the tps. It stays the same when I unplug the crank position sensor but climb to 3.26 when I disconnect the cam position sensor. I've read threads that say crank position sensor will kill fuel fire and Guage. Can someone point me in the right direction. I am starting to flatspin

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post #2 of 22 Old 08-12-2015, 04:25 AM
ZeeJay1997
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You're on the right track to figure this out but you didnt say if you have a no start condition or not. The cam sensor can cause a no start as well as the the crank sensor. In your case, if it is a no start and based on what you posted, it sounds like something else is causing the problem.

Try the same test, but disconnect both O2 sensors and check the wiring going to them for damage.
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post #3 of 22 Old 08-12-2015, 04:53 AM
coralman
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I'll have to remember that word. Since its what I do at my job mostly all day long. Flatspin.

Info on projects and repairs categorized by system
http://www.jeepforum.com/forum/f13/c...-faqs-2863665/

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lol...if life is as a simple as a 5.9 making you happy, I'd say go ahead and buy it on impulse. ZJs are the way of Zen. Wax on, wax off
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post #4 of 22 Old 08-12-2015, 04:54 AM
ZeeJay1997
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just point at the ground and give it some rudder, you'll recover.
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post #5 of 22 Old 08-12-2015, 04:57 AM Thread Starter
Lsuzj
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Will do after work. It cranks but no start. Also the factory alarm will not activate. Don't know if it has anything to do with the issue. Tried to use key in all doors
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post #6 of 22 Old 08-12-2015, 04:02 PM
ZeeJay1997
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Quote:
Originally Posted by Lsuzj View Post
What else might cause no spark no fuel. Pcm is only 25k old(jeep dealership ) dude on here said o2. They are only bout 8k old. I know they don't last forever but it has ran with them disconnected. Both. I'm stumped.
So is this a recent event ... running with the O2 disconnected?
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post #7 of 22 Old 08-13-2015, 04:47 AM Thread Starter
Lsuzj
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Bout 4 year ago cpu went bad and delayed the coil output as a result of this the exaust system exploded. Split manifold, gutted cat,and opened the muffler up like a beer can. It has been back together and running great for almost a year
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post #8 of 22 Old 08-13-2015, 05:08 AM
ZeeJay1997
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post #9 of 22 Old 08-25-2015, 05:46 PM Thread Starter
Lsuzj
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New crank sensor and still no spark or fuel. Help.
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post #10 of 22 Old 08-25-2015, 05:56 PM
GreenHorn420
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Having the same issue in my niner, feel free to check out the threads i made, even though istill havent resolved my issue
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post #11 of 22 Old 08-25-2015, 06:41 PM Thread Starter
Lsuzj
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Have you checked full pump?
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post #12 of 22 Old 08-25-2015, 06:42 PM
ZeeJay1997
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Quote:
Originally Posted by Lsuzj View Post
New crank sensor and still no spark or fuel. Help.
Does the CEL come on with the rest of the idiot lights when the key is moved from the off to the on position?
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post #13 of 22 Old 08-25-2015, 06:50 PM
GreenHorn420
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Does the fuel pump alter not having spark? I dont think so, but i could be wrong.
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post #14 of 22 Old 08-25-2015, 06:51 PM Thread Starter
Lsuzj
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No cel no fuel gauge no voltage meter. New crank position sensor. It acts like fuel pump has quit but with no spark idk
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post #15 of 22 Old 08-25-2015, 07:48 PM Thread Starter
Lsuzj
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When key is on factory alarm light is on (lil red light on dash in windshield ) also.
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