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idles great, runs rough when driving

Posted: Sun Aug 07, 2011 9:33 am
by sect8dr
got an 89 with a 2.9, 5 speed, factory t-case, and dana 44 front, and 9 inch rear with 38.5 tires. Lately it starts up fine, idles great but when i hit the throttle it does not want to run, it spits and sputters and falls on its face. There is a sweet spot with the throttle pedal, when you find this sweet spot it will run great all the way to 65. i can't figure it out thought maybe someone on here could give me a clue

Re: idles great, runs rough when driving

Posted: Sun Aug 07, 2011 5:09 pm
by Ranger Dave
38.5 tires,what gears ya got

Re: idles great, runs rough when driving

Posted: Sun Aug 07, 2011 5:57 pm
by sect8dr
4.88 for now going to either go lower in the axles or in the t-case soon. It does pretty well considering the lack of power. plus i dont have any lockers in there yet so that helps keep it alive.any ideas on the sputter?

Re: idles great, runs rough when driving

Posted: Sun Aug 07, 2011 6:36 pm
by Ranger Dave
check the fuel presuure