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post #1 of 2 (permalink) Old 06-02-05, 10:25 AM Thread Starter
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1988 Ford Bronco II - Hesitation on acceleration

Does anyone know what could be wrong with a 2.9 litre 5 speed that really hesitates on acceleration? Could it be the fuel injectors or the fuel filter? I have used 93 octane gas and also tried the fuel additive. It works for a while but then goes back to the hesitation and sometimes back fires. For the most part it is when I shift into 4th gear and try to accelerate. It sounds like spark knock. I have had the truck checked out not too long ago - replaced belts, hoses and filters. I am not sure they changed the fuel filter though. I have had someone mention trash in the lines but I don't know how to fix that. I would appreciate any suggestions.

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post #2 of 2 (permalink) Old 02-19-06, 02:08 PM
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Re: 1988 Ford Bronco II - Hesitation on acceleration

Quote:
Originally Posted by daneal
Does anyone know what could be wrong with a 2.9 litre 5 speed that really hesitates on acceleration? Could it be the fuel injectors or the fuel filter? I have used 93 octane gas and also tried the fuel additive. It works for a while but then goes back to the hesitation and sometimes back fires. For the most part it is when I shift into 4th gear and try to accelerate. It sounds like spark knock. I have had the truck checked out not too long ago - replaced belts, hoses and filters. I am not sure they changed the fuel filter though. I have had someone mention trash in the lines but I don't know how to fix that. I would appreciate any suggestions.

i have an 88 bronco2 i changed the fuel filter and the pump i seemed to help
 
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