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Thread: Low Power At Top End

  1. 11-05-2014 #1
    langleylas
    langleylas is offline
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    Low Power At Top End

    I'm running out of power after +/- 60 MPH. Up to that point if I hammer the gas it takes off like a champ. But if i'm going down the highway and I nail it, the shift and the engine both feel like I'm out of power. Idiling I am seeing around 62 lbs of fuel at the rails, when I really get on the gas moving down the road it drops about 5 lbs. I'm not sure where else to look to figure out this issue. Any help is GREATLY appreciated.

    Specs:

    1997 S10 running a 6.0L out of a 2002 Silverado 2500. Automatic Trans, 1998 Camaro Intake, Factory ZO6 Corvette Cam
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  2. 11-05-2014 #2
    5FDP
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    Did you tune the motor for the different cam and intake with a wideband??

    If not, the VE and MAF are now going to be completely wrong and a good cause of you problem.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.
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  3. 11-23-2014 #3
    briantr2
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    Sounds like a restricted fuel system or too small a fuel inlet in the tank or a fuel pump pick up sock tnat is restricting the fuel
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