djm_e22

iTrader: (2)

I am completely lost. I have been trying to switch over to OBD1 PCM but the car just dies after about 3 seconds. I have tried two separate OBD1 PCM's with the VATS removed and no luck. As soon as I stick the OBD2 PCM back in it stays running.

Is there anything I could have done or removed when I was using the OBD2 PCM at the time that is causing these OBD1 PCM's to die after 3 seconds? Thanks for any help.

BigBadWhitey

iTrader: (3)

did you switch the knock sensors as well?

djm_e22

iTrader: (2)

Yep, but even if I didn't would that cause it to die after 3 seconds?

moehorsepower

iTrader: (3)

I am trying to help him out, I have never ran into this problem, we have always just installed the OBD I PCM and the cars would fire right up, The knock sensor would only throw a SES light, I tried deleting the VATS on one ( which I have never had to do before) and sent him a different PCM with the same problem, I am also stumped.

WS Sick

Does it have a knock module in the PCM?

jr79

Might not help but we went to fire mine up and it would run for a second or 2 and die. I checked my scanner and my fuel trims where like 128. I disconnected my maf sensor and she runs all the time. Havent had a chance to keep looking at it. I dont know if that will even help you.

robsquikz28

iTrader: (246)

If Moe is stuck then your car is fukt.

The ks will only cause a ses light.
Are you still running your factory ckp sensor?

djm_e22

iTrader: (2)

Don't mean to sound stupid, but what is ckp?

greenZ96

iTrader: (6)

I had some troubles with my car when I was tuning it. had a speed density tune in it and it wouldnt run with the maf plugged in but would unplugged.

jaycenk

iTrader: (1)

Have you checked the pins real good to Make sure one wasn't bent when installing it?

moehorsepower

iTrader: (3)

Well, he called me last night, Disconnected the MAF and it runs.. The tunes are not SD so I'm not sure why it is doing that..

djm_e22

iTrader: (2)

Just to let you know after I got off the phone with you I drove it like that. Problem was when I pressed the gas pedal just half way down the car almost dies.

schwhack

I am having the same problem with my OBD2 to OBD1 swap . I have a 97 TA that has been stroked ,cammed and LT4 intake . i decided to go all in on a OBD1 swap, socketed PCM , moates cable and OBD 1 knock sensor .. Now the car wont run. i stick the OBD2 PCM in and it fires right up . i found this tread through hours of googling .. can you please tell me what fixed the problem ?

Ed Wright

iTrader: (1)

This is probably a really stupid question, but why the hell are so many of you guys wanting to change to an OBD2 PCM? Somebody tell you they would run faster?

schwhack

after my mods i had to get something tuned . i started with a junkyard PCM for 30$ and a cable for 70$ . i know quite a bit about computers ,so in theory for a 100$ i should have been able to data log and tune myself . unfortunately the junk yard PCM got bricked while i was writing a tune to it ,so for another hundred i got it socketed . The knock sensor was like 35$ .. so hindsight , i should have just sent my OBD2 off ..