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Old 07-18-2014, 11:19 PM   #1
Trusty_jeep22's Avatar
Join Date: Jul 2014
Posts: 41

I have a 1990 jeep wrangler and I'm having a problem when I start it up and start to drive when I'm in first and second it'll like quit accelerating then pick right back up but feels like it's about to die right before that. I put new plugs wire and distributor cap on it thinking bad plugs and stuff but nothing helped it I put cfoam through it trying to clean it up but didn't really help. Thanks again guys

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Old 07-19-2014, 07:21 AM   #2
mrjoey's Avatar
Join Date: Mar 2014
Posts: 159
what motor?

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Old 07-19-2014, 12:54 PM   #3
Trusty_jeep22's Avatar
Join Date: Jul 2014
Posts: 41
2.5 4 cylinder
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Old 07-19-2014, 01:45 PM   #4
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Join Date: Jul 2014
Posts: 90
Sounds almost like fuel starvation
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Old 07-19-2014, 01:54 PM   #5
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Join Date: Mar 2012
Location: Ridgway, Pa.
Posts: 4,391
Take a look at the new plugs that you installed, they will tell you what it's doing.

Black, its running to rich, white/gray is too lean, light brown is the color that you are after.

And stock champions or autolite are the plugs to run. Don't waste your money on those big fancy expensive plugs, since you don't have a big fancy expensive motor for them to go into.

Sounds like you might need to clean the throttle body, sometimes they get carboned up to the point where sea foam won't even clean it out. Check and clean all of the electrical connections to the throttle body as well. Those mean a lot with that TBI injection system.
'87 YJ, 4.2L built and bored, 8.5" of lift, 8.8 rear, AX15/NP 231, Tom Woods drive shafts, Flat fenders, 12,000LB winch, Custom bumpers, Rattle can paint job. Never completed...
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