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Type: Posts; User: frojoe

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  1. Replies
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    What that change things? I've tried with...

    What that change things? I've tried with injectors plugged in or unplugged, and the computer is giving same wide-open injector pulse. Measured resistances of injectors and they're all damn near the...
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    Bump.. anyone with any input? Any electrical...

    Bump.. anyone with any input? Any electrical logic/calculation "diagram" or "flow chart"??

    I'm at my wit's end with this damn problem.
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    Thanks for the input SSUte01, and I've looked at...

    Thanks for the input SSUte01, and I've looked at that table, but more what I'm asking is, logically, how does the PCM compute the Cranking Commanded AFR?

    I'm not looking to tune the table, I'm...
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    Back-tracing calculated PID's?

    My Commanded AFR during cold cranking is thru-the-roof-rich (4-5:1), and I'd like to figure out what inputs/tables the PCM uses to calculate this value.

    I've checked all the sensors, they're...
  5. Is there any type of logic diagram or flow chart...

    Is there any type of logic diagram or flow chart that I could backtrace why the computer is commanding such a low cranking AFR, aka see what parameters/multipliers are going into that calculation??
  6. Does it normally time out? Or only go away once...

    Does it normally time out? Or only go away once running? I have nothing to compare to with this swap because the previous PCM that I just replaced did not output to the MIL light, or output VSS or...
  7. One more thing.. I can control my MIL light...

    One more thing.. I can control my MIL light on/off thru the scanner, but with key in ign the MIL light is constantly on, but there aren't any DTC's being reported in the scanner......??
  8. I did as you suggested, and it's still commanding...

    I did as you suggested, and it's still commanding 4-5:1 afr and just dumping fuel (injector pulse widths 25-30ms).

    40021

    40022
  9. LQ4 flooding during crank, no fire, commanded afr crazy rich

    Car was running/starting before winter. LQ4 swap with bigger injectors, 2.5bar MAP sensor. When cranking the commanded AFR is crazy low (3-5:1 ratio range) and the injector pulse is 30+ msec, and...
  10. I'm still confused as to why it has this behavior...

    I'm still confused as to why it has this behavior of barely starting then stopping with both the new speed density tune and the old stock(ish) MAF tune.. could it be that it I haven't zero'd out the...
  11. Ok thanks, i'll try that!

    Ok thanks, i'll try that!
  12. Not sure why I had the offset table zero'd out...

    Not sure why I had the offset table zero'd out but I copied over the offset values from the stock tune and tried to start the motor again, knowing it wouldn't be perfect for the injectors but maybe...
  13. Thanks for the response, to be honest I've spent...

    Thanks for the response, to be honest I've spent so much time looking at the tables and different tunes, my eyes kindof fuzzed over. I can't remember what I started with or what I changed. When I...
  14. VATS is turned off, and no I didn't have the head...

    VATS is turned off, and no I didn't have the head off... out of curiosity what would that've possibly meant?

    I realized I have a 2.5bar Cobalt sensor in it. Ordered the 2bar sensor. Even with...
  15. Thanks for the response. It appears that I...

    Thanks for the response. It appears that I didn't delete the 1bar PID and insert a 2bar PID in the scanner, which I will now do and test.

    I do have a 2bar MAP in there, engine will not fire at...
  16. LQ4 will fire but lose injector pulse immediately

    I have a 2005 LQ4 with a 2bar speed density tune that will fire up right away when cranked but will putter out after barely 1 second. VATS is off. I lose injector pulse according to the scanner. ...
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