11-22-2008, 12:08 PM | #1 |
Just Empty Every Pocket
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Truck running bad
Low speeds are fine. Get it onto the highway and push any more than ½ throttle and it seems like it is loading up and backfiresd a lot. Bad vaccum advance????
78 F-150 351m T-18 Thanks!
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91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon. |
11-22-2008, 01:35 PM | #2 |
Join Date: Jan 2007
Location: waco ky
Posts: 211
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low fuel prussure? !!!!!!!!!!
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11-22-2008, 10:59 PM | #3 |
Throttle Jockey
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Check your fuel pump and fuel filter.
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78 CJ-7, 350 V8, T-18a Tranny, Twin Stick Dana 300, Scout 44's, 4.27 Gears, 36" TSL's, Welded rear and Full Spool Front, Hi-Steer with GM Knuckles |
12-30-2008, 12:19 PM | #4 |
Just Empty Every Pocket
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Getting plenty of fuel. Took the ignition box to Autozone and they tested it and it came up as bad. Changed it and it is doing the exact same thing.
At lower RPM it runs very well. At higher, getting on the highway or getting ready to change gears, it cuts out and backfires. As soon as I get off the gas it runs fine. Arrrrrrrrrrrg. :mad:
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91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon. |
12-30-2008, 07:36 PM | #5 |
anywhere but there
Join Date: Jan 2007
Location: Blanchester, Oh
Posts: 174
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Almost sounds like timing to me but could it be getting too much fuel and is choking it out? What does it act like without driving and you rev the engine?
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12-31-2008, 01:59 AM | #6 |
Just Empty Every Pocket
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No problem. Only acts up under a load
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91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon. |
12-31-2008, 03:27 AM | #7 |
anywhere but there
Join Date: Jan 2007
Location: Blanchester, Oh
Posts: 174
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have you checked the vaccuum at all? Check the spark plugs. I think I had that problem with my 302 at some point and it may have been the plugs.
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