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Thread: 1228747 to 16197427 PCM Conversion mostly complete

  1. #1
    Fuel Injected!
    Join Date
    Feb 2015
    Location
    Ogden, UT
    Age
    40
    Posts
    139

    1228747 to 16197427 PCM Conversion mostly complete

    I finished repinning the two ECM plugs to the red and blue ones yesterday. Dave and Mark's notes for replacing a 1227747 was mostly accurate for a 1228747. Today was joining the dark blue wire from the knock sensor to the ESC Module and the yellow/black wire from the ESC Module to the ECM, and replacing the knock sensor with a KS6 sensor for the newer TBI 350's. Moates G1 Adapter and low profile ZIF allowed use of the 27SF512 EPROM.

    I started with the stock BJDR bin and updated for 383 CI, 80.5 lb/hr injectors @ 18 psi fuel pressure, and smoothed out the VE and Spark Tables. On first start, it took longer to fire but it did, then died. I have to give it a little throttle to get it to start and idle, then it is fine. Hot restart will idle fine, but if it sits for any period of time I have to give a little throttle to get it to start again. Does this mean the Crank to Run RPM value is too high? Or not enough fuel during cranking?
    1990 Chevrolet K2500, RCLB, Blueprint 383 TBI (16197427 ECM / 61 lb/hr / 16 psi FP), NV4500, NP241C, 4.10

  2. #2
    Fuel Injected!
    Join Date
    Feb 2015
    Location
    Ogden, UT
    Age
    40
    Posts
    139
    More info...

    Tried to start it again this morning and nothing. I ran a quick log when trying to start and the fuel pump is never running, and the Tachometer RPM seem way off. I have attached the current BIN and log file.
    1990 Chevrolet K2500, RCLB, Blueprint 383 TBI (16197427 ECM / 61 lb/hr / 16 psi FP), NV4500, NP241C, 4.10

  3. #3
    Fuel Injected!
    Join Date
    Feb 2015
    Location
    Ogden, UT
    Age
    40
    Posts
    139
    Figured it out. One of the terminals in the IAC plug came loose.
    1990 Chevrolet K2500, RCLB, Blueprint 383 TBI (16197427 ECM / 61 lb/hr / 16 psi FP), NV4500, NP241C, 4.10

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