OBD1 PCM in 97 SS Camaro...
05-10-2010, 07:09 PM
#1
12 Second Club
Thread Starter
iTrader: (15)
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes
on
0 Posts
OBD1 PCM in 97 SS Camaro... I am putting an OBD1 PCM from a 94 M6 LT1 Camaro into my 97 SS Camaro...I have O2 sims on the rear cats for now (used with the OBD2 PCM) and I removed the CPS Reluctor Wheel when I built my engine. The OBD1 PCM will nto look for those anymore so no worries there. I am going to swap my 97 LT1 Knock Sensor to a 94 LT1 Knock Sensor, and run OBD1 from now on.....now here is my question.
The plug inside the cab of the car where the tuner cable plugs in is the same as the 97 LT1, but the CPU is the OBD1 system which if I am right does NOT require a VIN coded cable to tune the PCM...am I right? Where can I get a cable that will work with lets say...LT1 Edit...with a 97 Camaro port, and an OBD1 PCM? Possible?? Anyone near Denver wanna hook me up? lol
The plug inside the cab of the car where the tuner cable plugs in is the same as the 97 LT1, but the CPU is the OBD1 system which if I am right does NOT require a VIN coded cable to tune the PCM...am I right? Where can I get a cable that will work with lets say...LT1 Edit...with a 97 Camaro port, and an OBD1 PCM? Possible?? Anyone near Denver wanna hook me up? lol
05-10-2010, 07:17 PM
#2
TECH Junkie
iTrader: (12)
Join Date: Sep 2007
Location: SFL
Posts: 3,012
Likes: 0
Received 0 Likes
on
0 Posts
95 LT1 f-bodies are OBD1 and have the OBD2 ALDL port (same as yours, 16 cavity plug IIRC), so in theory that should work. Not sure if that swap will work in general. You may need to swap over to an OBD1 harness, maybe not.. Like I said, not sure.
05-10-2010, 08:15 PM
#3
I am putting an OBD1 PCM from a 94 M6 LT1 Camaro into my 97 SS Camaro...I have O2 sims on the rear cats for now (used with the OBD2 PCM) and I removed the CPS Reluctor Wheel when I built my engine. The OBD1 PCM will nto look for those anymore so no worries there. I am going to swap my 97 LT1 Knock Sensor to a 94 LT1 Knock Sensor, and run OBD1 from now on.....now here is my question.
The plug inside the cab of the car where the tuner cable plugs in is the same as the 97 LT1, but the CPU is the OBD1 system which if I am right does NOT require a VIN coded cable to tune the PCM...am I right? Where can I get a cable that will work with lets say...LT1 Edit...with a 97 Camaro port, and an OBD1 PCM? Possible?? Anyone near Denver wanna hook me up? lol
The plug inside the cab of the car where the tuner cable plugs in is the same as the 97 LT1, but the CPU is the OBD1 system which if I am right does NOT require a VIN coded cable to tune the PCM...am I right? Where can I get a cable that will work with lets say...LT1 Edit...with a 97 Camaro port, and an OBD1 PCM? Possible?? Anyone near Denver wanna hook me up? lol
ive just done this samething. the wire that sends data is in the same position. so yes you can keep your harness and obd2 style data port.
05-10-2010, 09:13 PM
#5
To the best of my knowledge you cannot any "other" cable with lt1 edit. Only the ones its made for, which is vin locked regardless of the year.
You need to get an OBD 1 cable that fits your car (16 pin I believe since its a 97) and use software such as tunercats, or tunerpro.
You need to get an OBD 1 cable that fits your car (16 pin I believe since its a 97) and use software such as tunercats, or tunerpro.
05-10-2010, 09:37 PM
#6
TECH Fanatic
iTrader: (26)
Join Date: Mar 2010
Location: Milledgeville, GA
Posts: 1,909
Likes: 0
Received 0 Likes
on
0 Posts
I had a 95 M6 pcm out of a trans am laying around and asked this same question about a week ago on here. The replies I got were what you mentioned about the knock sensor being different so.....saturday night I swapped out the knock sensor and plugged in the 95 pcm. Car fired right up and I wouldn't have known it was any different. I also swapped in a used EWP I bought from a member and replaced a broken TSU while I had the coolant drained. Draining the coolant still leaves you taking an antifreeze shower when you remove the knock sensor, so be ready for that.
A guy here in town has a cable needed and tunes his 94, so I'm just waiting for him to have time to do some basic stuff to my bolt-on car.
Also, I haven't had a chance to verify this, but I read today that to read diagnostic codes with the OBD1 system and the OBD2 port...to just jump the #5 & #6 pins on the ALDL (as viewed left to right on top row) and then count SES light flashes just like on an earlier OBD1 system. If you don't know how that works, I will be glad to try and explain it.
Out of curiosity....why did you switch from OBD2? I did it because one of my O2 sims seems to be malfunctioning, and I don't have the knowledge or $$ to get into tuning the OBD2 system...however I know a few people here locally that have done OBD1 and are willing to help me out.
05-10-2010, 09:41 PM
#7
12 Second Club
Thread Starter
iTrader: (15)
Join Date: Mar 2007
Location: Cheyenne, Wy
Posts: 1,928
Likes: 0
Received 0 Likes
on
0 Posts
the 96 and 97 OBD2 PCM's can NOT be tuned by tunercats or tunerpro...the ONLY system that will tune them is LT1 Edit and that damned thing is pricey cause it is a $100 vin coded cable for every car you want to tune with it and you still have to purchase the software...My computer was not letting me tune it so I had to get a new computer anyways...it will be cheaper and more beneficial in the long run this way.
Trending Topics
05-11-2010, 04:23 AM
#8
Also, I haven't had a chance to verify this, but I read today that to read diagnostic codes with the OBD1 system and the OBD2 port...to just jump the #5 & #6 pins on the ALDL (as viewed left to right on top row) and then count SES light flashes just like on an earlier OBD1 system. If you don't know how that works, I will be glad to try and explain it.
05-11-2010, 05:46 AM
#9
TECH Fanatic
iTrader: (26)
Join Date: Mar 2010
Location: Milledgeville, GA
Posts: 1,909
Likes: 0
Received 0 Likes
on
0 Posts
Joe, I'm not saying this will definately work on a 95, much less a 96/97 converted to OBD1 car since I haven't had a chance to try it yet, but this is the info I had gotten:
It was a write-up on retreiving codes from a 95 (S10 was used for example in this case) that had the obd2 aldl and the obd1 system. It showed a picture of the government standardized obd2 aldl port with the 5th and 6th terminals jumped, saying that was how to do it. Information was from HP books(? I think that was publisher) on computer diagnostics. It wasn't particularly about lt1 cars though.
I know jumping the top two farthest right pins on an OBD1 aldl works. Why would this be 93 only for our cars? Was there something different about 94's? I thought the obd2 style connector didn't appear til 95?
Again....not saying you are wrong....just have some questions. Your replies are always very knowledgeable.
It was a write-up on retreiving codes from a 95 (S10 was used for example in this case) that had the obd2 aldl and the obd1 system. It showed a picture of the government standardized obd2 aldl port with the 5th and 6th terminals jumped, saying that was how to do it. Information was from HP books(? I think that was publisher) on computer diagnostics. It wasn't particularly about lt1 cars though.
I know jumping the top two farthest right pins on an OBD1 aldl works. Why would this be 93 only for our cars? Was there something different about 94's? I thought the obd2 style connector didn't appear til 95?
Again....not saying you are wrong....just have some questions. Your replies are always very knowledgeable.
05-11-2010, 06:42 AM
#10
Launching!
iTrader: (2)
Join Date: Dec 2006
Location: Goose Creek, SC
Posts: 285
Likes: 0
Received 0 Likes
on
0 Posts
Joe, I'm not saying this will definately work on a 95, much less a 96/97 converted to OBD1 car since I haven't had a chance to try it yet, but this is the info I had gotten:
It was a write-up on retreiving codes from a 95 (S10 was used for example in this case) that had the obd2 aldl and the obd1 system. It showed a picture of the government standardized obd2 aldl port with the 5th and 6th terminals jumped, saying that was how to do it. Information was from HP books(? I think that was publisher) on computer diagnostics. It wasn't particularly about lt1 cars though.
I know jumping the top two farthest right pins on an OBD1 aldl works. Why would this be 93 only for our cars? Was there something different about 94's? I thought the obd2 style connector didn't appear til 95?
Again....not saying you are wrong....just have some questions. Your replies are always very knowledgeable.
It was a write-up on retreiving codes from a 95 (S10 was used for example in this case) that had the obd2 aldl and the obd1 system. It showed a picture of the government standardized obd2 aldl port with the 5th and 6th terminals jumped, saying that was how to do it. Information was from HP books(? I think that was publisher) on computer diagnostics. It wasn't particularly about lt1 cars though.
I know jumping the top two farthest right pins on an OBD1 aldl works. Why would this be 93 only for our cars? Was there something different about 94's? I thought the obd2 style connector didn't appear til 95?
Again....not saying you are wrong....just have some questions. Your replies are always very knowledgeable.
05-11-2010, 01:25 PM
#12
Joe, I'm not saying this will definately work on a 95, much less a 96/97 converted to OBD1 car since I haven't had a chance to try it yet, but this is the info I had gotten:
It was a write-up on retreiving codes from a 95 (S10 was used for example in this case) that had the obd2 aldl and the obd1 system. It showed a picture of the government standardized obd2 aldl port with the 5th and 6th terminals jumped, saying that was how to do it. Information was from HP books(? I think that was publisher) on computer diagnostics. It wasn't particularly about lt1 cars though.
I know jumping the top two farthest right pins on an OBD1 aldl works. Why would this be 93 only for our cars? Was there something different about 94's? I thought the obd2 style connector didn't appear til 95?
Again....not saying you are wrong....just have some questions. Your replies are always very knowledgeable.
It was a write-up on retreiving codes from a 95 (S10 was used for example in this case) that had the obd2 aldl and the obd1 system. It showed a picture of the government standardized obd2 aldl port with the 5th and 6th terminals jumped, saying that was how to do it. Information was from HP books(? I think that was publisher) on computer diagnostics. It wasn't particularly about lt1 cars though.
I know jumping the top two farthest right pins on an OBD1 aldl works. Why would this be 93 only for our cars? Was there something different about 94's? I thought the obd2 style connector didn't appear til 95?
Again....not saying you are wrong....just have some questions. Your replies are always very knowledgeable.
Not sure why GM decided to eliminate that feature in the 94 model year.Maybe what you saw was how to use an OBDI cable/scanner with the 95 16-pin ALDL port?
05-11-2010, 03:07 PM
#13
TECH Fanatic
iTrader: (6)
Join Date: Oct 2007
Location: Central Valley, CA
Posts: 1,119
Likes: 0
Received 0 Likes
on
0 Posts
the 96 and 97 OBD2 PCM's can NOT be tuned by tunercats or tunerpro...the ONLY system that will tune them is LT1 Edit and that damned thing is pricey cause it is a $100 vin coded cable for every car you want to tune with it and you still have to purchase the software...My computer was not letting me tune it so I had to get a new computer anyways...it will be cheaper and more beneficial in the long run this way.
05-11-2010, 08:07 PM
#15
05-11-2010, 08:50 PM
#16
TECH Enthusiast
if you happen to not like the setup that ramair95ta posted from shbox then remove an OBD1 connector from a car in the junkyard, splice into the wires behind the plug you currently have and run it over to the glovebox. its worked great on my 95 (bastard plug)and for a friends 96 obd1 conversion and all we had to do was buy 1 cable made for the 94.
05-13-2010, 12:58 AM
#17
TECH Fanatic
iTrader: (26)
Join Date: Mar 2010
Location: Milledgeville, GA
Posts: 1,909
Likes: 0
Received 0 Likes
on
0 Posts
Tried jumping terminals 5 & 6 on the obd2 aldl in my 97 (with 95 PCM) today. Ya'll are right about it not flashing codes. (Figured you would be.) However it did kick the coolant fans on and it reset the SES. Is this a quick way to clear codes or something I better not try again? Not trying to high jack this thread, but instead to generate more information for the OP (and myself in the process.) Those simple jumper connections in the pic from Shoebox's site look like the way to go.
07-12-2011, 02:18 AM
#18
Teching In
Join Date: Nov 2010
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
94z28 pcm Problems I've got a problem with my 94 Camaro.Here is what I did.I had a 1997 z28 camaro that had been tuned and everything ran good until it was wrecked the motor still ran good.I put engine in a 94z28 without a pcm so i used one from a 95 manual trans z28 and it never would shift gears no power too.So I used the one fro the 97z28 it shifts but still no power and pops at times.One guy told me to change the Knock sensor I did didn't help.Can anyone help or do you have any suggestions
