Re: 99 vortec 5.7 issue???
well when i first installed the new engine i still had the problem. since i had replaced the cap, rotor, plugs and wires when istalling the new engine i ruled that out. i also had a new fuel pump so that wasnt the isse. had a code of low voltage on tps, changed it and it didnt fix it. my buddy that work at the proving grounds told me to run 4 bottlrs of injecter cleaner in the tank, so i did it and with in 50-60 miles the studdering was gone, hasnt come back either. he figured it is the poppits dirty/clogged and said if the cleaner worked, that i should then take my upper plenum off and clean all of them by hand or get the upgraded spider. well i havnt done that as i havnt seen the problem come back, but if it does i will put the upgraded spider in.
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72 chevy 3\4 ton 4 speed 4x4
84 1\2 ton 4x4 (gone but not forgotten, thanks for the memories)
1999 suburban 4x4
1982 chevrolet S-10 V-8 (Thanks uncle EARL)
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