OBD I conversion
This is a discussion on OBD I conversion within the LT1 forums, part of the Vehicle Specific category; Ok found out that all along I had an OBD I pcm laying in my garage. My car is a ...
11-10-2010, 02:06 PM #1
OBD I conversion
Ok found out that all along I had an OBD I pcm laying in my garage. My car is a 97 and OBD II. What do I need to do to convert my car?
11-10-2010, 07:38 PM #2
Why would you want to go with the OBD1 PCM? You have plenty of tuning options, and I believe some have gone to the LS1 pcm for even further tunability.
11-11-2010, 04:00 PM #3
OK long story short. My tuner decided to stop suporting LT1 cars. Vince at Trifecta. I was shocked. Tuner Cats on OBD I has Datamaster and is a lot cheaper than my options for OBD II or an LS PCM upgrade since I have an OBD I laying in my garage and not being used any time soon. I'm just figuring out all my options here so I can figure out which way to go since I have a tune related issue and now my tuner is not supporting my tune I paid for (no corrections for a small fee). So I would have to go pay full price somewhere else and at that point why not just by the damn software and learn how to do it.
11-12-2010, 10:21 AM #4
- Join Date
- Aug 2005
- 2004 GTO
You have to either change the knock sensor or put a resistor in the PCM. Mine has the resistor, so I can just swap the PCM if I had to.Rob
11-13-2010, 09:53 PM #5
can you swap from a obd1 to a obd2? And if so what all is involved? i have a 94 z28. My tuner doesnt support obd1 as i went from a ls car to lt recently.
11-15-2010, 01:03 PM #6
an LS tuner usually wont touch an obd II LT1 if he dosn't do Obd I lt1's
But that said you just need to swap the PCM and knock sensor. But with all the programs and free software out there for OBD I why would you? They even have real time tuning software out there for them now.
11-16-2010, 05:17 AM #7
if you state has inspections you will FAIL. if you have a car that came with ODBII you can't go back, you can only go forward. if you are going to do anything then put in a LS pcm. it has been done.
11-17-2010, 09:51 AM #8
No inspections hear in FL. I wouldn't pass if they did as it sits right now lol.
11-17-2010, 04:52 PM #9
I don't know about what would have to be changed but it will need setup for speed density tuning.. OBD1 are making a come back as a reliable simpler tunning alternative.. Mostly in the 60* v6 crowds.. There are companies that burn chips and so forth.. I went to speed density stand alone on my TT build project.. Lets me tune from a laptop or hand held in SD.. No MAF either.. Just MAP, knock, IAC, TPS, and MASS, and wide bands is my setup in short..
Last edited by Smittro; 11-17-2010 at 04:54 PM.
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