1227747 to 16197427 Conversion PCM Swap with Wiring Pinout Directions!

**corvetteracing** · 04-21-2017

works & correct

**Rob 689** · 09-16-2022

Hi everybody.

Im pretty certain ive got my wiring figured out and its in my bin file were the problem lies. i swapped my truck and i cant get it to start now. ive gone over the wire diagrams that ive gotton from prodemand online and the diagrams found here on this thread and other places on this site. I pulled the 16196395 PCM out of a 94 K1500 Suburban and installed it into a 94 K1500 Pickup with a MANUAL transmission and a 5.7L TBI with unknown history but runs great and had zero issues when i pulled the 16196396 ECM out of it to swap in the new one. I completely de pinned the connectors off of the suburban harness that matched the 6395 PCM and then one wire at a time pinned my harness out of its connectors and into the new ones for the new pcm. Now the truck stutters and tries to start but wont run. Before i did the swap the truck ran extremely rich at idle i think somebody swapped the cam before me idk but i did succesfully tune quite a bit of it out to be quite smooth on the blm graphs in tuner pro and the injectors are fine and i rebuilt the throttle body and replaced the factory o2 and installed a wide band guage and the also headers on the truck and the entire exhaust is brand new i custom built it myself and it does not have any leaks to contaminate the o2 readings. everything is in proper order it just wont run. There are no factory bin files for my setup as this PCM only came in small blocks with autos or big blocks with autos or sticks but i have a small block with a stick. I also am running the hacked $0D mask and i am not certain that i have all the settings in the bin set up correctly.

**In-Tech** · 09-16-2022

Originally Posted by Rob 689

Hi everybody.

I'm pretty certain ive got my wiring figured out and its in my bin file were the problem lies. i swapped my truck and i cant get it to start now. I've gone over the wire diagrams that I've gotton from prodemand online and the diagrams found here on this thread and other places on this site.

I pulled the 16196395 PCM out of a 94 K1500 Suburban and installed it into a 94 K1500 Pickup with a MANUAL transmission and a 5.7L TBI with unknown history but runs great and had zero issues when i pulled the 16196396 ECM out of it to swap in the new one.

I completely de pinned the connectors off of the suburban harness that matched the 6395 PCM and then one wire at a time pinned my harness out of its connectors and into the new ones for the new pcm. Now the truck stutters and tries to start but wont run. Before i did the swap the truck ran extremely rich at idle i think somebody swapped the cam before me idk but i did succesfully tune quite a bit of it out to be quite smooth on the blm graphs in tuner pro and the injectors are fine and i rebuilt the throttle body and replaced the factory o2 and installed a wide band guage and the also headers on the truck and the entire exhaust is brand new, I custom built it myself and it does not have any leaks to contaminate the o2 readings. everything is in proper order it just wont run.

There are no factory bin files for my setup as this PCM only came in small blocks with autos or big blocks with autos or sticks but i have a small block with a stick. I also am running the hacked $0D mask and i am not certain that i have all the settings in the bin set up correctly.

Hiya, I edited your post, it is very hard to follow along with what seems like a run-on sentence. No offense intended, many will not read nor reply if it isn't easily readable.

I think I might have a good starting point for you. I converted an '05 stick 4k type environment to the red/blue 7427 'puter yeeeeeeears ago. I hope this will help you. This file is a running file, so, if it doesn't work you can chase from there. :)

**Rob 689** · 09-16-2022

Originally Posted by In-Tech

Hiya, I edited your post, it is very hard to follow along with what seems like a run-on sentence. No offense intended, many will not read nor reply if it isn't easily readable.

I think I might have a good starting point for you. I converted an '05 stick 4k type environment to the red/blue 7427 'puter yeeeeeeears ago. I hope this will help you. This file is a running file, so, if it doesn't work you can chase from there. :)

Awsome thank you so much. Yeah just ask my english teacher from when i was a kid about my run on sentences lol ill try to keep on top of that thanks for the advice

**In-Tech** · 09-16-2022

Shoot, my bad. I meant a '95...not an '05. Anyway, that is a 350 "stick" TBI red/blue '7427 file if it helps you get going.

**Rob 689** · 09-17-2022

Originally Posted by In-Tech

Shoot, my bad. I meant a '95...not an '05. Anyway, that is a 350 "stick" TBI red/blue '7427 file if it helps you get going.

Yeah it should help I will start working on it tonight. One more question on the new 6395 PCM There is the ground at pin A1 does A2 also need a ground added?

**Rob 689** · 09-17-2022

Maybe I’m mistaken but I could swear I thought I saw in a diagram somewhere pin A2 had a ground but it was not the same application as my truck but same pcm.

**Rob 689** · 09-17-2022

Originally Posted by In-Tech

Hiya, I edited your post, it is very hard to follow along with what seems like a run-on sentence. No offense intended, many will not read nor reply if it isn't easily readable.

I think I might have a good starting point for you. I converted an '05 stick 4k type environment to the red/blue 7427 'puter yeeeeeeears ago. I hope this will help you. This file is a running file, so, if it doesn't work you can chase from there. :)

so im looking through the bin trying to figure something out cus it didnt start the truck as is and i noticed that in the scalers it says number of cylinders is set to 167? shouldnt it say 8?

**In-Tech** · 09-17-2022

That file is an OD mask.

**Rob 689** · 09-17-2022

Originally Posted by In-Tech

That file is an OD mask.

oh. good to know. thanks. I was using $0E. idk why i though i was in od but when you go to the 16196395 PCM in the thread that has all the ecms and their associated files the 6395 only has OE i then went to the 7427 thread and saw all the $0D stuff and now i see said the blind man lol.

**In-Tech** · 09-17-2022

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

**Rob 689** · 09-17-2022

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