Fuel System Issues - JeepForum.com
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post #1 of 2 Old 06-21-2013, 08:52 PM Thread Starter
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1993 YJ Wrangler 
Join Date: Jun 2013
Location: Starke
Posts: 1
Fuel System Issues

So I think Im having some problems with my fuel system. Heres what my jeep has been doing: When it idles, it starts spitting and sputtering, almost like its trying to turn off (the RPM needle bounces around periodically). It drives fine with short distances but when i drive it for more then 30 miles or so, it randomly starts spitting and sputtering really really bad and i have to pull over. After pulling over, Ive noticed when I put a few bucks of gas in it, it runs fine again until i drive more then 30 miles again, etc, etc. (This also occurs no matter how much gas is in the tank, happens when its empty and full)

I assumed i had trashy gas and/or my fuel filter was clogged, so i replaced it and it ran more smoothly and didnt spit as much when it idles, but it keeps acting up after longer distances (more then 30 miles of driving).

Any suggestions on what the problem might be? I thought to change the fuel pump next but wanted to make sure before spending the money and time changing it out.

xrobbiexleex is offline  
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post #2 of 2 Old 06-21-2013, 09:42 PM
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1987 YJ Wrangler 
Join Date: Jun 2012
Location: Albuquerque
Posts: 847
Get a new gas cap. I would bet that your gas cap is bad and is not allowing the fuel system to maintain pressure. The computer is probably thinking it has a large vac leak and going into a limp mode. Since the problem clears up for a bit after you remove the gas cap and them re-install it, is a good glue that your cap is bad.
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