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Thread: 1227747 to 16197427 Conversion PCM Swap with Wiring Pinout Directions!

  1. #76
    Fuel Injected!
    Join Date
    Nov 2017
    Location
    Californiacation
    Age
    57
    Posts
    811
    Code:
    00004000 0000 FFFF FFFF EC11 0D01 E10C 93A5 0098 ................
    Code:
    L4000:  FDB $23AF   ; ID BYTE, 9135d
                        ;
    L4002   FDB $FFFF   ; Platform ID  
    L4004   FDB $FFFF   ; Platform ID   
                        ;
    L4006   FDB $0000   ; CK SUM 
                        ;
    L4008   FCB $0D     ; CK BYTE   Change to AA to disable checksum check
    This is line 4000 in a hex editor, at 4008 is the mask id, the checksum is at 4006,7 and is calculated from 4008-FFFF
    Last edited by In-Tech; 09-17-2022 at 08:04 AM.
    -Carl

  2. #77
    Fuel Injected!
    Join Date
    Aug 2022
    Age
    30
    Posts
    167
    so i still cant get it to start. when i plug in my laptop to the aldl connector and look at the data i can connect with the pcm and the sensor data looks as it should be. CTS matches ambient temp, TPS seems to be operating properly. map is a no vaccum but while cranking i can see the map signal pull a small vacuum but not full obviously its barely cranking compared to running rpm. It also back fires a little one out the intake. i added extra fuel thinking it was lean? but seemingly no difference in how it stumbles and tries to start but then wont.

    The fuel table I was playing with is under the BPW Parameters and is labeled Idle VE vs. MAP vs. RPM. Is this even the right spot to be looking or should i be playing with tables under the category listed as Cranking Fuel Parameters? non of them say ve or anything.

    That was last night. ill try puling fuel this morning. maybe thats the right direction? On the original computer the truck ran really rich at idle under a stock bin file but it did run just fine always started.

    ive tried adding fuel and removing fuel and nothing. Is it just me or is the map reading looking funny? starting to think its not my fueling im lost please help
    Last edited by Rob 689; 09-26-2022 at 06:17 PM.

  3. #78
    Fuel Injected!
    Join Date
    Aug 2022
    Age
    30
    Posts
    167
    Quote Originally Posted by In-Tech View Post
    Code:
    00004000 0000 FFFF FFFF EC11 0D01 E10C 93A5 0098 ................
    Code:
    L4000:  FDB $23AF   ; ID BYTE, 9135d
                        ;
    L4002   FDB $FFFF   ; Platform ID  
    L4004   FDB $FFFF   ; Platform ID   
                        ;
    L4006   FDB $0000   ; CK SUM 
                        ;
    L4008   FCB $0D     ; CK BYTE   Change to AA to disable checksum check
    This is line 4000 in a hex editor, at 4008 is the mask id, the checksum is at 4006,7 and is calculated from 4008-FFFF
    oh nice i didnt know you could figure out the mask like that, thankyou

  4. #79
    Fuel Injected!
    Join Date
    Aug 2022
    Age
    30
    Posts
    167
    So my truck is running quite well on the new pcm now but theres one weird issue left. My speedometer does weird things only key on engine off. It likeises up and floats around in the 45 50 mph range and holding the brake lights on or turning the headlights on makes it move around somewhat sporadically and then slowly rise up some. You start the engine and it snaps down to zero no problem. Im confused

  5. #80
    Fuel Injected!
    Join Date
    Aug 2022
    Age
    30
    Posts
    167
    Also speedo functions normally while driving around. Its just key on engine off

  6. #81
    Fuel Injected!
    Join Date
    Aug 2022
    Age
    30
    Posts
    167
    Also i set minimum tps for PE to the max anc the minimum speed to the max and the minimum temperature to the max. It still comes on if i put my foot in it. Im also getting alot of knock counts and i think its stuck in high octane spark but i deffinatly have a fullass tank of 87. The highest at the pump in my state is only 90 as well.

    anyone got any ideas on where to look in the bin?
    Last edited by Rob 689; 09-26-2022 at 07:12 AM.

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