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  1. Replies
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    Car bucks and stutters above 125MPH WOT. Happens...

    Car bucks and stutters above 125MPH WOT. Happens when it is cold out. Am located in Houston TX (sea level)
  2. Thread: Lt4 hpfp

    by C7LT4
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    Where are you located? What is the temperature?

    Where are you located? What is the temperature?
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    They changed the LPFP and crossover pipe. Car...

    They changed the LPFP and crossover pipe. Car runs smoother and much stronger/responsive. Haven't taken it up to high speeds as it was rush hour will report back if its not solved.
    86343
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    Ben, Thanks for your reply. The vehicle is...

    Ben,

    Thanks for your reply. The vehicle is bone stock with no tune. I took the Vehicle to corvette world Houston and the gentleman who put the car on the dyno just provided me with the file. I had...
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    update on this thread ...

    update on this thread

    https://forum.hptuners.com/showthread.php?75982-C7-Z06-Hesitation-at-WOT&p=556525#post556525
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    *Update Put the car on the dyno to datalog...

    *Update

    Put the car on the dyno to datalog while I get the hesitation. lpfp pressure was low 59psi and the high pressure was around 2700psi. Took the car to the service department and provided...
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    Higgs, is this something that I need to...

    Higgs, is this something that I need to specifically request at the service place? Ive had similar issue and they replaced the HPFP and the fuel pressure sensor. Same issue...
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    What was the fix? I have the exact same problem...

    What was the fix? I have the exact same problem and changed the HPFP and the fuel pressure sensor....
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    C7 Z06 Hesitation at WOT

    I think I may have an issue with my low-pressure fuel pump. My HPFP and fuel pressure sensor has been replaced but still have hesitation at higher RPM WOT.

    There was a similar thread but no...
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