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  1. so it costs 2200$ just to unlock a 2019 silverado?

    As a moderately professional tuner can someone please explain to my whats the use of spending 1300$ on an unlocked PCM and then spend ANOTHER 500$ to license it? Then if i want to even tune the...
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    Stupid question are your low octane and high...

    Stupid question are your low octane and high octane tables the same as each other?
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    Yeah right, lextech responding that dude's a ghost

    Yeah right, lextech responding that dude's a ghost
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    Put a carburetor on it and call it a day :)

    Put a carburetor on it and call it a day :)
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    If so please explain... There is no high rpm...

    If so please explain... There is no high rpm disable in dynamic airflow table on the black box computers. That's how you force the LS/LT stuff into MAF only, after the high RPM disable it uses...
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    Forgot to add: The fuel to wall concept requires...

    Forgot to add: The fuel to wall concept requires an understanding of how the Transient fuel system works.

    Impact factor is used as the throttle blades are opening (positive MAP change). The...
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    Generally Vortec heads like about 30-32 degrees...

    Generally Vortec heads like about 30-32 degrees of ignition timing for best cylinder pressure. With a higher duration camshaft like the ZZ4 you loose low RPM volumetric efficiency (hence why cammed...
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    Are you using beta version? I can't open the...

    Are you using beta version? I can't open the file...

    I have 97 k1500 with a vortec 350 zz4 cam swap and i can help you out. First thing you're going to want to do is give that thing some more...
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    Another thing go into your Force motor current...

    Another thing go into your Force motor current positive and negative tables and make sure the last cell (92 psi/640 kpa) has 0 amps all the way down
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    The factory runs the really low shift pressures...

    The factory runs the really low shift pressures because the factory setups the calibrations to lean heavily on the torque management to not burn the clutches in the transmission while keep a smooth...
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    You're getting line pressure and TV pressure...

    You're getting line pressure and TV pressure confused.

    Line pressure is the pressure directly after the pump/regulator valve. Line pressure is regulated at a set PSI based on the spring in the...
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    LS2 E40 ECM drive by cable

    I know the E40 ECM doesn't have the hardware to control an IAC but assuming I just wanted to set idle speed with the set screw like a carburetor could you get an E40 ECM to work properly with drive...
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    On a stock OS with out any patches running speed...

    On a stock OS with out any patches running speed density only AKA running maf-less will only use the secondary VE table
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    Speed density aka VE is not accurate at cold...

    Speed density aka VE is not accurate at cold engine temps from what I've seen.

    What I've done is if I'm targeting a 13.5:1 AFR during cold start/warm up I would have to command a much richer AFR...
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    TCC release during coast

    I have a 1998 chevy Tahoe PCM running a 5.7L vortec and 4l60e transmission. I believe the tables for minimum tps are missing from hptuners on this operating system.

    We all know how most gm trucks...
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    If you're trying to read a 0-90 ohm sensor from...

    If you're trying to read a 0-90 ohm sensor from the PCM using the Fuel level input then its a very wise idea to put a 47 ohm resistor inline with the sending unit to effectively make it a 47-137 ohm...
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    0411 / 98-00 Vortec ECMs

    0411 / 98-00 Vortec ECMs
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    PCM Fuel gauge questions.

    Simple question regarding fuel gauge output on most GEN 3 PCMs.

    The Fuel Level output pin I'm assuming is a PWM output that opens and closes the circuit to ground on that output pin. In other...
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    Id suggest finding a different shop to rebuild...

    Id suggest finding a different shop to rebuild your transmissions...
    Nothing much we can help with pure mechanical/hydraulic problems from the tune side
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    You want the X and Y axis to match exactly with...

    You want the X and Y axis to match exactly with the X and Y axis in the tune file. RPM vs MAP is useless if the tune file uses RPM vs Cyl air mass.
    you can do this easily by going into the tune,...
  21. Actually stoichiometric (14.7 AFR gas aka 1.00...

    Actually stoichiometric (14.7 AFR gas aka 1.00 lambda) is where the hottest combustion temperatures take place.

    Anything lean or rich of stoich is a cooler combustion. The saying lean is mean is...
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    Im running a 98 tahoe PCM swaped into a 1997...

    Im running a 98 tahoe PCM swaped into a 1997 silverado 5.7L L31 vortec with only upgrade being a ZZ4 cam.

    You can pick up ALOT from the stock tune. First thing i always do is disable torque...
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    Yes thats what im doing. I disable all adaptive...

    Yes thats what im doing. I disable all adaptive idle to try to dial in the base running airflow. Seems no matter what i do to base running airflow the IAC counts wont go over 100 in gear idle.

    If...
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    Then how come increasing base running airflow...

    Then how come increasing base running airflow doesn't open the IAC more?
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    What does base running airflow do?

    My other thread isnt getting much attention about an issue im having tuning idle on my truck so let me ask in case my understanding of it is wrong

    What exaclty does the numbers in the base running...
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