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Old 08-16-2011, 12:57 PM   #1
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Angry Engine quits intermittently!!!

95 wrangler 2.5L....First happened a month ago, first drive of the morning 4 blocks from home engine died. Would crank but not start. after sitting a minute or so it would start and run while sitting still, but die when I drive. Pulled it home, next morning bought a fuel filter (quick and easy optomism) before installing it everything ran normal, after installation, test driving around the neighborhood, hit speed bump, died, started back up and has run without issue for a month.

Yesterday, hit bump on the way into gas station, quit. Put gas in, started and ran fine for 20 minut drive, till I hit a rough road, died, again, would crank but not start, after 1 or two minutes, started fine and ran 3 blocks to friends house where it now sits while I work.

Any ideas where to start with this hard to duplicate intermittent problem!!! PLEASE!

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Old 08-16-2011, 01:30 PM   #2
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Another note, I have not checked fuel pressure yet, but I do hear the pump running when I first turn the key, even when it won't start.

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Old 08-16-2011, 01:33 PM   #3
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bad electrical connection somewhere.
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Old 08-16-2011, 01:39 PM   #4
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The question is, if it is a bas connection, I understand the bump shutting it down, but why would it go from not starting to starting with out a bump to get it back in line?
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Old 08-16-2011, 04:27 PM   #5
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The question is, if it is a bas connection, I understand the bump shutting it down, but why would it go from not starting to starting with out a bump to get it back in line?
It's hard to know exactly why for sure, but the bad connection is your problem. I would start with anything ignition related. Remove and reseat ALL connections and test out. I think it is ignition and not a fuel electrical problem as the engine would sputter to a stall if the fuel pump was turning off, but ignition shutting off acts like the key was turned off.
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Old 08-16-2011, 04:52 PM   #6
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Good point, since I made the bump connection, I have focased my thoughts on ignition as well, still just bugs me how it can come back in 2 minutes with no other inputs. Tomorrow I will be back on the same side of the country and will start doing some serious trouble shooting, I'll let everyone know what I find.

By the way, love the GTO, helped restore a 70 GTO vert. years ago.
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Old 08-16-2011, 06:26 PM   #7
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x-2 on bad connection
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Old 08-16-2011, 08:45 PM   #8
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It's prolly a short in the wiring that's kicking a breaker or relay....when it cools down, it resets.......
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Old 08-17-2011, 07:41 AM   #9
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Not the same, but on my Ranger, it had one connector that went to battery -. If I hit a bump, it killed the vehicle. Sometimes it came back, sometimes I had to wait. Sometimes I would go to start it and it never would fire over.


I found it by pure luck by turning the key one click on, not turning the vehicle on but the position right before that, whatever it's called. You can hear electrical stuff engage when you did it. Anyway, with the key in this position, I wiggled various wires and listened for anything electrical to engage/disengage. If all is good, nothing should change. If intermittent connection, you may hear something happen, something change.

Just an idea.
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Old 08-21-2011, 05:47 PM   #10
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Mine is doing the same thing....I need some ideas if anybody has had this happen and fixed it.
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Old 08-22-2011, 11:27 PM   #11
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OK, so far so good, but only time will tell, replaced the crank position sensor. If it quits again, I will let you know. Thanks for all your help!

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