jeep wont stay running, now wont start - JeepForum.com
 
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post #1 of 6 Old 07-18-2010, 06:56 PM Thread Starter
89General
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1989 YJ Wrangler 
 
Join Date: Apr 2010
Location: Harford County,MD
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jeep wont stay running, now wont start

i have had a 89 wrangler 5 speedfor about 2 months now, fixed a few things here and there. and yesterday it started puttin along slow and wouldnt accelerate when i was in gear. it would start to stall out when i put in nuetral at a stop. today i went to try to change the oil and couldnt even get it out of my neighborhood without stalling it 3 times. it sounds like something with the fuel but i cannot figure it out. any ideas? ive read a couple things but it doesnt seem right.


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post #2 of 6 Old 07-18-2010, 07:05 PM
moonshinefuel
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Location: Los Angeles. California. United States.
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I would check the codes real quick, see if I can find something there. I then would for spark in all the cylinders. Then I would pressure test the fuel line. Basically spark, fuel, timing.
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post #3 of 6 Old 07-18-2010, 07:14 PM Thread Starter
89General
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1989 YJ Wrangler 
 
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Location: Harford County,MD
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thats what i was thinking with maybe the fuel, im gettin towed to the shop tomorrow to mess with it so well see.

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post #4 of 6 Old 07-18-2010, 07:26 PM
rgpemt
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1990 YJ Wrangler 
 
Join Date: Jan 2009
Location: Maine
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I have a 90 with the 4.2 and have suffered a lot of issues that are similar sounding. If you have a 4.2, let me know and i'll drop what I have hoping to help! Good luck

Bustin Mine, Savin Yours! Support your Firefighters, EMT's, Paramedics, and Law Enforcement Officers!
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post #5 of 6 Old 07-18-2010, 08:08 PM
NonRubicon
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1990 YJ Wrangler 
 
Join Date: Nov 2009
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Could be alot of different things. Air, fuel and spark are all needed in the right ratios at the right time to have everything run smooth. The list of things that could cause the problem you are experiencing is long. Some could be engine specific.

Common issues between the two engines that could cause hesitation and stalling are: dirty fuel filter, bad/worn/improperly gapped spark plugs, worn/fouled distributor cap/rotor, faulty spark plug wires, bad ignition coil, bad fuel pump. I'd check these components first.

I recently developed idle and stalling issues that were multifaceted in their cause: air leak at the carb, dirty carb, fouled spark plugs gapped too large, old plug wires, fouled distributor cap and rotor, exhaust leak at the muffler. My distributor cap was not really worn, but as it was a OEM style cap it had devoloped quite a bit of oxidation on the terminals that was affecting the delivery of spark to the plugs and causing me to stall out. Replacing the fuel filter did not seem to help in my case, but I ended up with a new one anyways as part of the basic tune-up. Each little repair made it run a little better, but only once I had taken care of all of these things did the idle return to normal without any missing or stalling. Your mileage may vary.
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post #6 of 6 Old 02-11-2011, 05:57 AM
nembudonna
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1990 YJ Wrangler 
 
Join Date: Feb 2011
Location: northwest
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I'd check the MAP sensor.
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