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    Thought I would finish out this old thread in...

    Thought I would finish out this old thread in case anyone else encountered a similar i
    issue. I discovered that the installer of the crate engine had attached multiple grounds to a single ground...
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    Agreed! I've not encountered this before-even...

    Agreed! I've not encountered this before-even with multiple crate engine tunes. Some other forum posts have suggested that this 495HP version of the LS3 has some as delivered ecm issues that the...
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    Fuel PSI via my OTC direct at rail gauge reading....

    Fuel PSI via my OTC direct at rail gauge reading. System has LT headers with 2 1/2" dual exhaust system with X pipe to performance chamber style oval mufflers with tail pipes to rear bumper.
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    Oh Yeah, I forgot that. It's right at 58psi.

    Oh Yeah, I forgot that. It's right at 58psi.
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    GM Crate LS3-480 LTFT too high

    I'm an ASE cerified tech but kinda new to tuning. Have customers '55 Chevy with brand new crate LS3-480 with supplied pre-programmed GM E67 ECM (495 adv. HP, 10.7:1 CR, .219/.228x.525/.525 cam-LSA...
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    Just wondering if you were able to receive my...

    Just wondering if you were able to receive my earlier messages? I have sent this file a couple times but bounce-backs indicate a server problem (not on my end). My customer is getting very impatient....
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    HI Bill, Thanks for your reply. I've attached...

    HI Bill,
    Thanks for your reply. I've attached the file for your review. Again, I can see the downloaded ECM file but get the error Message: "Invalid VIN/OS pair" when I attempt to license the...
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    2015 Camaro 6.2 VIN/OS error

    I was able to download the vehicle's ECM file data but could not license it. Received error message that implied VIS/OS was not a valid pair. Instructions said to email file to HPTuner support. They...
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    Part Throttle Run On

    Just tuned a 2003 K2500 8.1 with great results. However, upon releasing the throttle after a 60-70% TPS at 40-55MPH pull, the vehicle continues to accelerate (for 1-2 seconds) as though throttle is...
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    Thanks planethax! Always be to remember the...

    Thanks planethax! Always be to remember the basics.
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    Interface connection failed

    :doh:
    After having tuned dozens of vehicles, suddenly I get the error message "no interface connection". I tested the OBDII port for power and tested the cord to interface unit for continuity--both...
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