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richardndawnc, ASE Certified Technician
Category: Chevy
Satisfied Customers: 187
Experience:  ,Service manager for 14 years, Shop Owner
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when i accelerate my truck backfires and sputters/jerks, what

Customer Question

when i accelerate my truck backfires and sputters/jerks, what is wrong?
Submitted: 8 years ago.
Category: Chevy
Expert:  richardndawnc replied 8 years ago.
hello and welcome,

may I start off by asking what year make and model your truck is ,so that I may better assist you?
Customer: replied 8 years ago.
1991 1500 chevy silverado 2wd
Expert:  richardndawnc replied 8 years ago.
what have you tried ,if anything to resolve this ?
Customer: replied 8 years ago.
we havent tried anything yet
it has a rebuilt transmission that is about 3-4 years old and a newer fuel pump but it started doing the backfiring and jerking thing a while after this work was done on it.
Expert:  richardndawnc replied 8 years ago.
the place to start is check the ignition timing, and the other ignition parts, as the plugs and wires and so on, if this is within factory specs, then you need to check the fuel pressure , it should be between 12-15 psi on your truck, if it is alright ,then you need to run a compression test to make sure that you do not have a bad lobe on the camshaft, I have seen this in a few of these trucks a sthey get older, so just keep this in mind as well, but if the compression is alright, and all the other things listed are ok, then it is going to be a worn distributor shaft ,or a coil that is leaking current to the outside windings, that is allowing the sprk to break down under acceleration.
Customer: replied 8 years ago.
thank you very much! Laughing
Expert:  richardndawnc replied 8 years ago.
anytime, happy to help