Problem with OBD port not communicating, after engine swap
11-16-2004 | 07:49 PM
#1
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TECH Junkie
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From: Glen Burnie, Md
Problem with OBD port not communicating, after engine swap Have the OBD port, pin are pinned out in the right location. Could get the port to work, so I grabbed an extra OBD port I have, gave it the two grounds and one hot it needs, tapped into the two signal wires (wht/blk and the tan wire) right at the computer itself. It communicates fine.
Go under the dash. Check the hot terminal and two ground terminals... they are providing voltage and grounding fine. But port still doesnt work. Then I ran a wire from the computer itself, to the corresponding pin on the port. Doesnt work. Figured having the stock routing of the wires and the direct line to PCM piggybacking on top of that may cause interference - so cut the stock wiring to take it out of the loop.
So now we have tan and wht/blk wire runnign from port to pcm, our one hot and two grounds... just like I pick it up under the hood... still no comm.
Any ideas? What did you V6 swap guys do with your port?
Go under the dash. Check the hot terminal and two ground terminals... they are providing voltage and grounding fine. But port still doesnt work. Then I ran a wire from the computer itself, to the corresponding pin on the port. Doesnt work. Figured having the stock routing of the wires and the direct line to PCM piggybacking on top of that may cause interference - so cut the stock wiring to take it out of the loop.
So now we have tan and wht/blk wire runnign from port to pcm, our one hot and two grounds... just like I pick it up under the hood... still no comm.
Any ideas? What did you V6 swap guys do with your port?
11-17-2004 | 12:05 AM
#3
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TECH Junkie
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From: Glen Burnie, Md
Its a V6->V8 car. i didnt "do it" you couldnt pay me to do it... Although now, Im trying to help the guy out and not exactly getting paid to figure this headache stuff out lol
Im in the middle of sticking an LS1 in my 97 SS though... looking forward to more fun
The LT1 in the 99 T/A will be easy, DFI startign from scratch anyway
Im in the middle of sticking an LS1 in my 97 SS though... looking forward to more fun
The LT1 in the 99 T/A will be easy, DFI startign from scratch anyway
11-17-2004 | 12:11 AM
#4
I can shift faster than you.
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From: Baton Rouge, LA
lol, I'm doing a '99 V6 - '99 LS1 swap next week for a friend (John@Thunder). Hopefully, it won't be too bad since it will be a '99+ V6 to '99+ LS1. Also going from a 4L60E to T56.
Jason
Jason
11-17-2004 | 12:23 AM
#5
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TECH Junkie
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From: Glen Burnie, Md
well your eliminating the headache parts (the major year differences and the 4L60E)
Do you have any 97-98 style Vette fuel rails/regulators? i dont see why i couldnt plop those rails on, run it to a vacuum source, throw static number in the IFR tabel and roll with that
This car (LT1->LS1)is the one I was trying to get your motor for. looks like its going to the same purpose
Do you have any 97-98 style Vette fuel rails/regulators? i dont see why i couldnt plop those rails on, run it to a vacuum source, throw static number in the IFR tabel and roll with that
This car (LT1->LS1)is the one I was trying to get your motor for. looks like its going to the same purpose
11-17-2004 | 04:07 PM
#6
I'm not sure what blk/wht and tan wires you are using, but the serial data wire I used comes off of the Blue 230 plug, pin K, Dk green, PCM pin 58 (PCM blue connector I think).
Thats a crude OBDII port pinout lol, but 2 is serial data, 4 and 5 are grounds, 16 gets 12V with ignition turned on. Thats all you need to communicate.
\ 1 2 3 4 5 6 7 8 /
\9 10 11 12 13 14 15 16/
Thats a crude OBDII port pinout lol, but 2 is serial data, 4 and 5 are grounds, 16 gets 12V with ignition turned on. Thats all you need to communicate.
\ 1 2 3 4 5 6 7 8 /
\9 10 11 12 13 14 15 16/
