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    Believe I have stock LT4 and also ZZ3. Send a PM...

    Believe I have stock LT4 and also ZZ3. Send a PM if interested.
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    Does the LT1 version of TC have complete...

    Does the LT1 version of TC have complete programming or recover pcm options?
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    If this pcm is OBDII compliant (or partly...

    If this pcm is OBDII compliant (or partly compliant) then it might provide misfire data using mode 4.
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    Hello and welcome.

    Hello and welcome.
  5. It sounds like there may be a faulty connection...

    It sounds like there may be a faulty connection either at or inside the ecm. Check all the terminals in the plugs to ensure they are not misshapen. If you cannot find a problem you may want to...
  6. Hello and welcome to the forum. Please see...

    Hello and welcome to the forum.

    Please see your other thread for my reply to this problem.
  7. Welcome to the forum You could post in the gm...

    Welcome to the forum

    You could post in the gm efi forum and see if anyone replies.
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    I don't believe the subject is difficult. But I...

    I don't believe the subject is difficult. But I believe most people think about how to treat knock after it begins instead of trying to prevent it from happening.

    The goal of tuning is to...
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    It usually takes several degrees of retard to...

    It usually takes several degrees of retard to stop knock once it begins, and this reduces power. Additionally once knock begins there is residual heat in the chamber and piston top which takes time...
  10. Thread: Hi again

    by 1project2many
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    Hello, Welcome to the forum. Thank you for...

    Hello,

    Welcome to the forum. Thank you for the compliment. Member contributions are what really makes this useful so please feel free to post photos, stories, or even questions.
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    If you used a hex editor to swap segments then...

    If you used a hex editor to swap segments then the checksums will be incorrect. If you take the modified file and swap the segments back, the checksum should again be correct. This twice modified...
  12. '89 File works on '88. 9th injector not...

    '89 File works on '88. 9th injector not controlled by ecm so disable by disconnecting temperature switch. You will need to "scan" vehicle as 89 once newer calibration is installed.
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    Except for acceleration enrichment, the fuel...

    Except for acceleration enrichment, the fuel parameters are based on correct numbers in the VE tables. PE values tell the computer what AFR to deliver, and the delivered AFR should be close to the...
  14. It really seems like pinpointing the system that...

    It really seems like pinpointing the system that has a problem should be easy.

    When an engine stalls and won't restart my approach as a tech is usually fairly simple. Remove fuel pump fuse,...
  15. This is the same issue that I had with a set of...

    This is the same issue that I had with a set of Keihin marine injectors years ago. I thought the solution would be simple because I ran the same injectors in my Chevelle with MEFI controlling it,...
  16. These do seem tough to find specs for. This...

    These do seem tough to find specs for. This document lists voltage corrections by injector series. IWP are top-end race injectors. ...
  17. You really want to follow a methodical test ->...

    You really want to follow a methodical test -> eliminate process to solve this. Simply replacing the intake gaskets is not the way to go imo.

    I think the bucket test isn't a bad one but as...
  18. Is this helpful?...

    Is this helpful?
    https://www.youtube.com/watch?edufilter=NULL&v=oGeMK6LvQck

    Edit: Lotsa "not nice" forum reviews on J&M.
  19. Ok... If you do need additional diagrams let me...

    Ok... If you do need additional diagrams let me know.
  20. What type of vehicle is the '92 engine from...

    What type of vehicle is the '92 engine from (Pickup, Suburban. Chassis Cab)?

    Is the 91 Suburban round c/k style or square r/v style?
  21. Unfortunately the bulkhead connector wiring...

    Unfortunately the bulkhead connector wiring diagrams are not part of the regular ecm wiring diagrams. They can be tough to locate. If you haven't found any by tomorrow I will try to locate some...
  22. I feel there is more to this story. If no one...

    I feel there is more to this story. If no one wants to work on the car it's generally not the car's fault. From perfect to undiagnosably messed up in a short time is atypical. Good mechanic...
  23. The sensor appears to produce a 12V square wave...

    The sensor appears to produce a 12V square wave signal. I'm having trouble confirming but one forum discussion mentions eight pulses per tire revolution. If so, calculating the pulses per mile is a...
  24. Beginning at $FFC0 to the top of the chip ($FFFF)...

    Beginning at $FFC0 to the top of the chip ($FFFF) there are addresses for the ecm to use when various events occur. If one of these addresses is even a bit off you can have very unexpected results. ...
  25. If you can get information about the Porsche...

    If you can get information about the Porsche signal it may be easier to figure out what's going on. The signal type (a/c or d/c pulse) and the number of pulses per mile or per driveshaft revolution...
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