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  1. Replies
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    You can go here...

    You can go here http://198.208.187.182/internet/VehiclePartFits.jsp and put in the part number for the 97/98 PCM (16238212) and see what GM vehicles use it.

    This is a great tool - a reverse lookup...
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    I also have a 1998 and have also had occasional...

    I also have a 1998 and have also had occasional connections problems since I installed V7.4.2 and the newest V1 driver. I thought it was a coincidence (and maybe it is) until I saw this thread.

    I...
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    72,194

    Thanks

    Thanks
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    The 1998 F-body fuel tank holds 15.5 and the 99+...

    The 1998 F-body fuel tank holds 15.5 and the 99+ hold 16.8 gallons. Shouldn’t you use the stock 1998 calibration data in the 2002 flash?
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    I am sorry but I do not understand "Wiki"....

    I am sorry but I do not understand "Wiki". :redface:

    How do I fine the table you are talking about?


    John
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    This is great news! What about the ECT gauge? ...

    This is great news! What about the ECT gauge?

    [edit]
    Never mind....It will operate the same as it will still use the same sender and gauge cluster....
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    Is 12595325 supported

    Is the following PCM supported?
    20:09:14.734: Request hardware nubner...
    20:09:14.855: Hardware: 12595325
    20:09:14.875: Request GM operating system...
    20:09:14.935: GM operating system: 12604440...
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    62,284

    Some more food for thought. The 98 Corvette and...

    Some more food for thought.
    The 98 Corvette and the 98 Z28 uses the same 28.8lb injector but the injector offset tables are different for all entries. TheVette values are higher except from 4.5v...
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    Mine does the same thing. The value is coming...

    Mine does the same thing. The value is coming from the Startup Friction Airflow Correction {B4343} table. As soon as this value zeros out it is transferred to the short term idle trim in drive and...
  10. Replies
    111
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    47,541

    Can you provide a little more detail? John

    Can you provide a little more detail?

    John
  11. Replies
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    My TB is drilled and I have moved the IAC...

    My TB is drilled and I have moved the IAC Effective Area table down between 3 and 5 positions from stock as well as leaving the table stock with little to no difference in the lean problem.
    Also...
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    I will flash the PCM with the PID values and see...

    I will flash the PCM with the PID values and see how it looks.
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    2,781

    VE tuning method observation

    When tuning the VE table while in SD mode (MAFless) using AutoVE the values in the main VE table at 2000 RPM/MAP 40 and 45 were 54.99 and 54.06.

    When tuning the VE table using the PID VE% (with...
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    My car is the same way. The fueling is very...

    My car is the same way. The fueling is very inconsistent until the car is fully warmed. This is why I went back to the MAF.

    John
  15. Replies
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    Today I put my MAF tune back into the car and did...

    Today I put my MAF tune back into the car and did a cold start. It took my WB 30 seconds to warm up but after it did the WB AFR was tracking with the commanded AFR from the start up temp to 77C. ...
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    111
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    Good info...Thanks Below is the part that...

    Good info...Thanks

    Below is the part that caught my eye. Was there ever any “more” posted about this?


    There is another way to disable the MAF system completely (ie. without setting the...
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    Well I really did not fix the problem; I just...

    Well I really did not fix the problem; I just covered up the symptom.
    Actual AFR verses commanded AFR differed by an average of 2 points during the 1st min of the cold start.
    The next min the AFR...
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    To confirm that the B3617 table truly had an...

    To confirm that the B3617 table truly had an affect on the cold ECT AFR I loaded PCM files with and without this table being zeroed out. With the table at stock values and zeroed out the AFR on the...
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    Good question. My commanded AFR has always...

    Good question. My commanded AFR has always matched the values in the "commanded fuel when in open loop" table.

    John
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    My take on B3702 Injection Timing and B3703...

    My take on B3702 Injection Timing and B3703 Injection Timing Trim tables.

    By the description of these tables it seems that they are values that the PCM uses to open the injectors earlier in the...
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    Here is what I have tried last night and today...

    Here is what I have tried last night and today and the results.


    Changed the OLAF table idle AFR at low ECT temps. back to the 13.3 values which were 11.2 to offset the lean condition.
    Put...
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    No problem. I appreciate the feedback. John

    No problem. I appreciate the feedback.

    John
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    We are running in open loop speed density mode...

    We are running in open loop speed density mode and once the car has been running for 5 -10 min the commanded AFR matches the WB AFR.

    John
  24. Replies
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    Very lean at idle RPM/MAP problem

    This problem is on a 1998 Z28 A4 with a 230/230 cam, ported heads, and LT headers.


    The lean condition only exists when on the SD tune. With the MAF I do not have this problem.

    On cold...
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    I just tested the flash file with the changes...

    I just tested the flash file with the changes that Ross posted about in the above post.

    The changes Ross made in the file corrected the high trans pressure problem. My trans pressure now act the...
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