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running bad

Discussion in 'The Garage' started by gmcjimmy90, Jul 25, 2005.

  1. gmcjimmy90

    gmcjimmy90 Registered Member

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    Location:
    arkansas
    i have a 1990 gmc jimmy(fullsize) with a 350 700r and this morning when i was coming home from work it started missing got home and checked everything out all plugs are firing fuel filter recently changed, and no vaccum leaks that i could find. It sounds like a carb. loading up,but it is tbi. have checked and it doesnt look like it is dumping to much fuel.
     
  2. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    How did you check your plugs? Just because a plug is firing when it's out of the engine doesn't mean it'll fire under cylinder pressure. Unless they're new I'd try a new set unless the misfire feels like more than one plug (it would be strange for several to go at once).
    Have you checked for trouble codes?
     

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