by Patrick on April 2nd, 2007

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1988 chevy silverado bogging down when accelerated, idles fine with MAP sensor unhooked, With MAP hooked up, idle is erratic, and bogs out when accelerating, occasional backfire through carb. Replaced fuel pump, filter, relay, spark plugs, wires, rotor.

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by BenThere HR on April 2nd, 2007
If you get no pick up and the MPG is about 2/3 of what it should be you could try cleaning out the catalytic converter. (or get a new one.) I've seen this happen twice.
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- Good suggestion. I should have mentioned that too.
  
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  by Rebelheart on February 9th, 2009
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by Anonymous on February 9th, 2009
im having the same problem, did you figure out what it was? please email me as soon as posible....joedefiwood@yahoo.com thanks
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- well, you have check or replaced just about everything that is likely the problem. My guess is to recheck the gap of you plugs.
  
  Also, if I am not mistaken, this car should have fuel injectors, not carbs. They could be the source of your problem. Run a good fuel cleaner thru them and see if that helps. Could you have an air leak somewhere? Thats a pretty old vehicle and some of the rubber hoses could have dry rotted. Change your fuel, play with using a higher octane. Regular should be fine, but just for the fun of it, try premium. These type of problems can be really puzzeling.
  
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  by Rebelheart on February 9th, 2009
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by BenThere HR on October 25th, 2007
Did you ever get your car fixed? How did you do it?
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by Anonymous on October 13th, 2007
I was having a similar problem with my 1991 Chevy. When I stomped on the gas it would bog down or die. A new fuel filter fixed it for me but it looks like you already tried that.
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by ol1eye on October 13th, 2007
that just sounds like a bad Bow Tie I recomend a BIP this is achieved by parking the vehicle in an unused part of your neighborhood inserting a rag of any color or material I.E. wool or cotton I recomend Cotton into the fuel fill nozzle leaving approximatel 4-5 inches hanging out and then use the handyman secret weapon a BIC light said rag and run like hell problem solved,you have just performed a BLOW IN PLACE..have a great day and happy motoring
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1988 chevy silverado bogging down when accelerated, idles fine with MAP sensor unhooked, With MAP hooked up, idle is erratic, and bogs out when accelerating, occasional backfire through carb. Replaced fuel pump, filter, relay, spark plugs, wires, rotor.

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1988 chevy silverado bogging down when accelerated, idles fine with MAP sensor unhooked, With MAP hooked up, idle is erratic, and bogs out when accelerating, occasional backfire through carb. Replaced fuel pump, filter, relay, spark plugs, wires, rotor.

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