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  1. Maf is defined by the sensor itself, and the tube...

    Maf is defined by the sensor itself, and the tube size, shape, and how close it is to bends. You "tune" the maf curve to accommodate these changes

    so yes, if the same cell commands a lower fuel...
  2. The difference in the lb/hr is the relationship...

    The difference in the lb/hr is the relationship between airflow and fuel. Looks like they removed approximately 23% fuel, up top anyway.

    That table is literally how much fuel to deliver at a...
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    connect to vehicle first, not record, after...

    connect to vehicle first, not record, after connecting only, repoll will be available. It will not be if you clicked record. If you have been recording, you have to disconnect, the reconnect.
  4. Poll: its a known issue that if you flash 03-07 gms for...

    its a known issue that if you flash 03-07 gms for the most part with aftermarket accessories, you are going to have to do some walk arounds to get it to flash correctly. Also there is no set in stone...
  5. Poll: the problem is that the ecm isnt known brickable...

    the problem is that the ecm isnt known brickable

    the op's problem is the aftermarket devices he has installed on his vehicle caused the issue. No way on earth a company like hpt can add...
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    I just spent 4 hours with another car on the...

    I just spent 4 hours with another car on the dyno, zero issues
    the one the other day was 04 cobra, one from yesterday was 02 gt

    both cars zero issues, if i repoll before clicking record
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    One thing i did notice here though, when first...

    One thing i did notice here though, when first starting scanner

    if i connect to vehicle, repoll for parameters, then start recording, it works flawlessly. If i just click record, it will glitch.
  8. Poll: I really hate threads like this. Hpt provides a...

    I really hate threads like this. Hpt provides a tool that you use at your own risk. It is your responsibility to research what you need to do or not do. You 100% proved the issue was not hpt, by...
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    I have done a bunch using mpvi1 and mpvi2 combo...

    I have done a bunch using mpvi1 and mpvi2 combo
    this was the first that i used the 2 exclusively
  10. Thread: Skim????

    by mbray01
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    There are companies that disable the skim. Google...

    There are companies that disable the skim. Google search will turn up a few
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    i typically see 415 auto/425 manual with same...

    i typically see 415 auto/425 manual with same mods, at 27 degrees timing, and .84 lambda.

    how much time did you spend dialing everything in, or did you just make a few quick pulls.

    the temp...
  12. reading the files has always been free, doubt...

    reading the files has always been free, doubt that will ever change! there are tuner locks available for some ecms, others would require modifying code, so the definition file wont work, and will...
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    it works for me, dont know what else to say. new...

    it works for me, dont know what else to say. new product releases are always riddled with bugs. they will always fix issues of the highest priority. eec ecms are a tiny market share for them, so i...
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    So, today, using beta a downloaded about 2 weeks...

    So, today, using beta a downloaded about 2 weeks ago, i tried logging using the mpvi2 only(not the 1). Logging 25 parameters(pretty much everything you could need) including loads, and sources, i...
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    Will work fine with 2.0!!!!!!3.0, or even 2.0...

    Will work fine with 2.0!!!!!!3.0, or even 2.0 transfers data faster than the ecm chip writing capabilities. You got nothing to worry about
    i write on a regular basis using both 2.0 or 3.0 (3.0 is on...
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    Well, its going to be coming from a spark...

    Well, its going to be coming from a spark modifier table, but without posting the tune, there is no way we are going to be able to tell you definitively where its coming from
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    What brand o2's, i would bet your fighting either...

    What brand o2's, i would bet your fighting either poorly functioning o2's or you have an exhaust leak. A leak the size of a pin hole at the o2 bung can give 25% deviation in fueling.
  18. As stated, properly tune both maf and vve, and...

    As stated, properly tune both maf and vve, and timing will correct itself. The map reads high, because the torque is off, and its opening the throttle body to compensate, and then the ecm pulls...
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    IF I TUNED DIESELS(WHICH I DONT) I WOULD BE...

    IF I TUNED DIESELS(WHICH I DONT) I WOULD BE LOCKING THEM TOO, AS THE DIESEL WORLD IS FILLED WITH COPYCAT TUNERS, AND GROUPS WHO BUY A TUNE AND SHARE IT WITH 25 FRIENDS CAUSE THEY ARE CHEAP. WITH...
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    35 degrees in middle range, low load areas is not...

    35 degrees in middle range, low load areas is not high, thats actually stock. Timing between 2800 to 3200 rpms on stock timing at medium load is between 34-40 degrees. So it goes back to is it actual...
  21. Likely the 16 is an early production my17...

    Likely the 16 is an early production my17 controller
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    How about posting the tune, and we can see if...

    How about posting the tune, and we can see if anything is amiss.
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    So first off, its not a 2.5, its a 2 bar, so if...

    So first off, its not a 2.5, its a 2 bar, so if your settings reflect a 2.5, that part of the issue. Now secondly, where did the sensor come from? Did you buy it from a gm dealer, or from some place...
  24. Geoff uses a software that keeps pinging the ecm...

    Geoff uses a software that keeps pinging the ecm repeatedly with different seed/key combos till it "unlocks" its very time consuming, you need a dedicated computer that can just run without input for...
  25. With that cam, you shouldn't have to touch the...

    With that cam, you shouldn't have to touch the torque tables, if you do, it would be very minimal. Your issue likely lies in the airflow models not being properly calibrated. Specifically the vve....
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