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Unread 04-22-2013, 11:04 AM   #1
Snowrats
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1988 YJ Wrangler 
 
Join Date: Mar 2013
Location: Bethpage, Tn
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Keeps shutting off.

Jeep keeps shutting off. Has a hard time starting then when it does start wont stay running the Roma just drop to 0 and it stops. It have a new distributor, distributor cap, rotar, timing chain with gears, new fuel filter. Some weeks drives fine others won't run at all I don't know what to check next.

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Unread 04-23-2013, 11:34 PM   #2
Speedymcracer01
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Jeep keeps shutting off. Has a hard time starting then when it does start wont stay running the Roma just drop to 0 and it stops. It have a new distributor, distributor cap, rotar, timing chain with gears, new fuel filter. Some weeks drives fine others won't run at all I don't know what to check next.
What year model do you have does it have a automatic tranny and what type of motor are you running?
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Unread 04-24-2013, 08:16 AM   #3
Snowrats
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It's an 88 4.2L v6
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Unread 04-24-2013, 08:24 AM   #4
Speedymcracer01
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It's an 88 4.2L v6
Is it a automatic and is it fuel injected or carb
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Unread 04-24-2013, 08:28 AM   #5
Snowrats
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Manual and it has a weber double barrel carb on in.
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Unread 04-24-2013, 08:49 AM   #6
Speedymcracer01
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Manual and it has a weber double barrel carb on in.
Trying to think not real familiar with the v6 models same with carbs i have a 89jeep comanche does your motor resemble this model? Trying to figure out what type of sensors you have does it have the tps map mass airflow sensors i apologize about all the questions im trying to get a visual of what type of setup see my comanche is carb but it still has all the sensors a new model would well besides a couple of things is yours like that
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Unread 04-24-2013, 09:25 AM   #7
Snowrats
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I don't know to be honest. I've only had the jeep for about a month. Im knew to all this.
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Unread 04-24-2013, 09:33 AM   #8
Speedymcracer01
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I don't know to be honest. I've only had the jeep for about a month. Im knew to all this.
Ok well when does it stall is it when you take a turn or when you shift into neutral or push in the clutch for traffic lights or does it just stall when ever
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Unread 04-24-2013, 10:42 AM   #9
Snowrats
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It will run for 30 seconds to a minute then shuts down I have good spark and and I'm getting good fuel through my fuel filter
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Unread 04-24-2013, 11:18 AM   #10
Speedymcracer01
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It will run for 30 seconds to a minute then shuts down I have good spark and and I'm getting good fuel through my fuel filter
Ok i would start with your thermal sensor look on your exhaust towards the manifold if you can test it with a circuit tester if not i would pull it and check it for any type of build up on its examine the wires and harnesses on both the thermal and emission o2 sensors then pop the hood check for loose connections around the carb it sounds like a mass map or idle control sensor does it try to buck like it wants to go but it just cant find the right fuel or air mixter when you give it gas does it start to go but very rough idle the engine rpms drop and make the engine shudder then it dies ?
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Unread 04-24-2013, 12:06 PM   #11
Snowrats
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If I loosen one of the fuel lines to the carb and alow it to draw in air it will run but once I tighten the clamp and it not longer draws the air it dies
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Unread 04-24-2013, 12:19 PM   #12
Speedymcracer01
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If I loosen one of the fuel lines to the carb and alow it to draw in air it will run but once I tighten the clamp and it not longer draws the air it dies
Check your carbs air fuel mixter might have to much fuel and not enough air if thats not it i would check your gaskets for leaks and any other sensor or vacuum line that would contribute to the air fuel mixter along with vacuum leaks thats what it sounds like
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Unread 04-24-2013, 12:28 PM   #13
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It will run for 30 seconds to a minute then shuts down I have good spark and and I'm getting good fuel through my fuel filter
This just hit me if you can pull the converter and see if its clogged or almost clogged that has made my car quit before it didnt want to run period didnt want to crank and would die seconds after cranking it then i had another car itz didn't want to crank and if it did crank it would only run a few seconds and the idle was a little rough i would have to heel toe the gas and brake with one foot and push the clutch with the other just to make a turn with out stalling and that was from a dirty mass airflow sensor
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Unread 04-24-2013, 12:38 PM   #14
Snowrats
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Ok I'll give that a try thanks.
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Unread 04-24-2013, 01:04 PM   #15
Speedymcracer01
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Ok I'll give that a try thanks.
Anytime if you can think of any thing else that might help figure this out just post it
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