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Type: Posts; User: vetteman3

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  1. I recently figured this out as I was noticing the...

    I recently figured this out as I was noticing the same issue - go to the spark page and find the 'spark minimum' table. This will have values all the way to -30. I tried bumping the whole table to...
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    So do you mean we will not longer have to do a...

    So do you mean we will not longer have to do a 'write all' but simply a 'calabration only' flash for PCM setting adjustments on the newer PCM's? What about for a transmission setting adjustment?
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    COT was my first thought also, so I disabled it,...

    COT was my first thought also, so I disabled it, and no difference!!
    Any other ideas?
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    anybody??

    anybody??
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    knock retard causing richer commanded AF ratio??

    I'm tuning a '02 Corvette and ran into something new. I noticed during some WOT 'runs' that the commanded a/f would suddendly drop from the 12.5 I had set to arond 11.9, and the reading on my WB...
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    After reading some posts about O2 switching...

    After reading some posts about O2 switching voltages it occured to me this could be a solution for my bank 2 lean out at 2000 RPM. I first examined my scan file to determine the airflow value...
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    Bill - Yes I was referring to not only the 6...

    Bill - Yes I was referring to not only the 6 speed auto in '06 and newer Vettes, but also in certain GM SUV's. So, are you saying that the latest version of HPT (2.1.18) has the capability to tune...
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    6 speed auto tranny

    I remember seeing somewhere that HPT cannot tune the GM 6 speed auto - is this correct?? If so, is something in the works to enable tuning?
  9. Thread: Flat Spot

    by vetteman3
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    Well what do you know, I guess EC tune was right....

    Well what do you know, I guess EC tune was right. I posted a similiar problem with my '01 Magnacharged Vette a couple of weeks ago and EC tune said he had observed this problem and believes it's due...
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    Ok, but what about the a/c compressor...

    Ok, but what about the a/c compressor disengauging at that RPM???
    And as I said earlier, it was only when I got the car really heated up. I figured the PCM, like most solid state circuits are heat...
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    I have spent consierable hours twiking the fuel...

    I have spent consierable hours twiking the fuel trims and they are pretty close. Would this harmonic only effect the right side injectors? And what about the a/c compressor disengauging at the same...
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    Thanks for the reply. Its a non-intercooled...

    Thanks for the reply. Its a non-intercooled Magnacharger set up for 7lbs of boost. It's a Lingenfelter engine with a 220/226 cam and forged internals. After the car cooled off the A/C compressor...
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    Does this sound like a bad PCM??

    I have been chasing erratic tuning issues in my '01 supercharged Vette for a while, and I'm starting to think it may be the PCM. Indications -- When the RPM is brought up to 2000 (+/- 200), the...
  14. Thanks for the reply. I have considered the...

    Thanks for the reply. I have considered the intake gaskets and injectors, but it doesn't make sense that the lean condition would only exist at 2100RPM, but it could be due to some other variable...
  15. Tune attached. As you can see, my VE is actually...

    Tune attached. As you can see, my VE is actually a bit fat in those cells plus the real brain teaser is, why does the right side lean out to the point that the engine stumbles??
    Could this indicate...
  16. Thread: A New PCM

    by vetteman3
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    How do you re-link VATS?

    How do you re-link VATS?
  17. Ok I figured it out, scan attached. Note that...

    Ok I figured it out, scan attached.
    Note that whenever the RPM is between 2000 and 2200, wheather moving or stationary, a large variation can be seen in the STFT's. Right bank gets a big POSTIIVE...
  18. Need help with diagnosis of part throttle problem

    I have been chasing an abnormality in my Magnacharged '01 Vette for a while and could use some new ideas. The car runs very good in all modes except for part throttle with RPM between 2000 and 2200....
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    Hey - nice to have such an informative discussion...

    Hey - nice to have such an informative discussion between us Corvette Guys!! Ok, its starting to sink in now and make some sense. Too bad this kind of information isn't in the help files and such?!...
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    Thanks for that explanation, but what about the...

    Thanks for that explanation, but what about the EQ ratio table? Is this used during OL, or CL , or during PE or what?
    And what about the Injector Flow Rate table, when would this table be used for...
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    Thanks for all the help, but I have to ask a...

    Thanks for all the help, but I have to ask a couple of questions.
    What is the advantage of tuning the MAF table instead of the VE table for part throttle fuel tuning, like Russ K advised?
    And...
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    Ok, I kind of figured it out. On the scanner...

    Ok, I kind of figured it out. On the scanner program, table view, for some reason after the LM1 pid it shows an AF of 12.4 while scanning engine idling, closed loop. On the graph view under wide...
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    I am being careful to stay in out of wot while...

    I am being careful to stay in out of wot while making my "runs". What I meant about the "still at -15" comment was after I did the first paste special to the maf table when it was showing -15, I...
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    need help with ve and maf tuning

    I'm trying to get the fuel trims squared away on my '01 Vette. It has a Magnacharger and a 220/226 cam. The trims were running around -14 to -20. So, I failed the maf, and after 4 or 5 runs using...
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    I got it fixed!!! And the problem wasn't with HP...

    I got it fixed!!! And the problem wasn't with HP tuners program, it was the LM1 set-up. I had not changed the voltage output for analog 2 to 0-5v. I played with this when I first got the lm1, but...
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