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Re: 1999 Silverado 4.3 problems
Quote:
Originally Posted by Autotropolis12
I recently purchased a 1999 Silverdo 4.3 V6 that is losing power at 3,500 Rpm's. Truck runs, and accelerates great up until around 3.5k then just pretty much falls flat on its face. There is no spark issues, and I just installed a 40 series flowmaster, and that didn't change the way it ran at all, so I am guessing not an exhaust problem.
I know that this is not a transmission problem due to the fact that if I rev the truck in park, it hits around 4k rpm and then starts to lose power.
When driving, I can floor it at 60 mph...and the truck will not accelerate at all nor will the rpm's increase. BUT if I give it half throttle...it runs fine.....
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Remember proper testing gives us the answer to many problems.
MT
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