I've posted on existing threads but not getting any response. I have a 1995 3800 SC out of a Buick Riviera. I'm doing the F40 swap and removing the 4T60E auto. I will need my EPROM reprogrammed. The EPROM is a plug in, not soldered in. I'm learning, from other threads, I may have a less popular setup. Series 1 has it's short falls, plus the Riviera computer is different from the more popular Park Avenue. So, can anyone reprogram my chip or do I have a near complete F40 swap for sale? Thanks, Kevin
------------------ 67 GT-40 Mark II, 3800 S/C auto, 85 Fiero based (ASPP) kit. Held suspension and coil-overs all around with 2" dropped spindles. Mike's leather interior. And a whole lot more...
Your eprom is most likely soldered in and part of a memcal board that plugs in. Such being the case the memcal adapter being referenced by Phonedawgz will probably be required. You plug the adapter in, the stock memory is bypassed and this allows a new programmed eprom to be plugged in.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
phonedawgz, I don't change the EPROM often. Not sure this would help me. I'm not finding anyone, yet, that can reprogram mine, since it's not very common.
------------------ 67 GT-40 Mark II, 3800 S/C auto, 85 Fiero based (ASPP) kit. Held suspension and coil-overs all around with 2" dropped spindles. Mike's leather interior. And a whole lot more...
Please post the service number off the PCM. A few things. The difference between a PCM and a ECM is an PCM also controls the transmission. I've seen at least 3 different PCMs 1994/1995 for controlling 3800 with 4t60e and there might be a 4th. The ones I have seen. Standard ALDL single wire O2 sensor and only 1 O2 sensor Before the cat. 12 pin ALDL ODB 1 and 1.5 Heated O2 sensor, 4 wire, with 2 O2 sensors. 1 before and 1 after the cat. 16 pin ALDL connector but ODB1 uses a different communication than the ODB 1.5. They both look very close. The 1.5 uses an odd 3 digit code, that I remember, rather than 2 digit like ALDL or 4 digit like ODBII The other odd ball is also ODB 1 but with only 1 O2. But I have not seen one. Don't know if it is heated O2 or not. The pre ODBII non 12 pin PCMs had a very bad habit of failing in the ignition control. Not likely, especially if you have a removable prom, would be late 1995 production with true ODB II. Same type of nightmare as 1995 Chevy Blazers with 4.3 4L60/5e. With those can be a ECM/TCM ALDL separate trans module. ODB 1 ,ODB1.5 and ODBII.
[This message has been edited by cmechmann (edited 01-25-2017).]
The PCM for a 95 Riviera would be 16183247 or equivalent. It is the one in my picture.
You don't need to change it often to need the adapter, you only need to change it once. The problem with the 16183247 MEM/CAL is that the CAL board is on top of the PROM.
Ryan Gick - sp1@gmtuners.com - should have no problem programming this PROM for you.
[This message has been edited by phonedawgz (edited 01-25-2017).]
phonedawgz, I don't change the EPROM often. Not sure this would help me. I'm not finding anyone, yet, that can reprogram mine, since it's not very common.
Re-programming is not usually a one time deal. You can get close with mail order tunes but every engine is slightly different. Depending on your CAI and exhaust design this can require tweaks to the tuning for optimum results. This where the Zif socket adapter comes in handy. I've probably changed the tuning in my 3800SC a dozen times but is uses a flash based PCM so chip removal is not an issue. On my Fiero with the V6, I've probably made 20 changes in the tuning but that ECM has a plug in eprom. Agree that Ryan at Sinister should be able to program the prom . Have you PM'd him? If not Wester's garage could probably do it.
------------------ " THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite. "THE COLUSSUS" 87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H " ON THE LOOSE WITHOUT THE JUICE "
My EPROM is a plug in. I have replaced it several times when I first installed my 3800 SC because of a wiring issue from the guy that did my harness. So I assume I have a later model 1995 PCM and true OBD ll. I have contacted Ryan Gick - sp1@gmtuners.com, but he is in the process of moving and has no internet at the moment. He returned my email with his phone and will be in touch as soon as he is able. If I could figure out this PIP thing, I'd post pictures of the 3 extra EPROMs I have, and any other photo info that would help. I appreciate the info here and everyone that is willing to share. I couldn't do it without you guys. THANKS! I'll wait to hear from Ryan. Kevin
------------------ 67 GT-40 Mark II, 3800 S/C auto, 85 Fiero based (ASPP) kit. Held suspension and coil-overs all around with 2" dropped spindles. Mike's leather interior. And a whole lot more...
Please post the service number off the PCM. A few things. The difference between a PCM and a ECM is an PCM also controls the transmission. I've seen at least 3 different PCMs 1994/1995 for controlling 3800 with 4t60e and there might be a 4th. The ones I have seen. Standard ALDL single wire O2 sensor and only 1 O2 sensor Before the cat. 12 pin ALDL ODB 1 and 1.5 Heated O2 sensor, 4 wire, with 2 O2 sensors. 1 before and 1 after the cat. 16 pin ALDL connector but ODB1 uses a different communication than the ODB 1.5. They both look very close. The 1.5 uses an odd 3 digit code, that I remember, rather than 2 digit like ALDL or 4 digit like ODBII The other odd ball is also ODB 1 but with only 1 O2. But I have not seen one. Don't know if it is heated O2 or not. The pre ODBII non 12 pin PCMs had a very bad habit of failing in the ignition control. Not likely, especially if you have a removable prom, would be late 1995 production with true ODB II. Same type of nightmare as 1995 Chevy Blazers with 4.3 4L60/5e. With those can be a ECM/TCM ALDL separate trans module. ODB 1 ,ODB1.5 and ODBII.
So like I'm not confused enough. My car is kinda buried in my garage and I can't get into the console to see the PCM number. I'm pretty sure it's 16183247. I have 1 O2 sensor and it has 4 wires. My ALDL is 16 pin. EPROM number is 16204419.
------------------ 67 GT-40 Mark II, 3800 S/C auto, 85 Fiero based (ASPP) kit. Held suspension and coil-overs all around with 2" dropped spindles. Mike's leather interior. And a whole lot more...
I recently went though installing the same engine- from a '95 Riviera. The PCM number you indicate is the correct one. It is OBD I Some folks refer to it as OBD1.5, since it uses an OBDII style port, and has OBDII style trouble codes. You may be able to have the stock proms "modified", but they require a special tool to erase them ( UV light), and they are not as easily reprogrammed as one might like. Almost no one tries that route, but instead gets the adapter like Phonedogs showed above and uses EEPROMs. Moates.net also has one, but stay with our guys if you can! You can get by without the zero insertion socket, but you will likely swap the chip in several times.
I have the programmer to re-program these, and also the software. I've done this swap on more than one car, but for some reason the available info on this PCM is minimum. I spent well over 100 hrs trying to get this working. I had to dig into the HEX code to be able to defeat VATS. After that, I still had some issues and finally gave up and had Ryan program it for me. You'll be time and money ahead with his help.
You'll also find that auto stores will not be able to read that PCM for codes. I finally switched the ALDL socket back to an OBD1 style, and bought a used scanner that will work with it. Even then, the availability of scanner info on the Riviera was non-existent. You can also use TunerProRT with a laptop and an ALDL cable to read realtime info.
------------------ '87 GT , '00 3800 Series II SC, 4t65e.
Thanks again darbysan. I'm not in a big hurry to get into this. (I also have a 1997 S10E. An all electric built by GM, with the EV1 drive train. I just replaced all 26 batteries and I'm having battery failures with only 50 miles on them. But that is another forum issue.) I just wanted to have everything possible ready for the F40 swap. I'm realizing that I probably never had to plug in any of my scanners, (I have 4), because I've never had any check engine lights or PCM issues. (Wish I could say that about my electric truck.) So I'll wait to hear from Ryan, once he gets settled, and proceed from there. Thanks, Kevin
------------------ 67 GT-40 Mark II, 3800 S/C auto, 85 Fiero based (ASPP) kit. Held suspension and coil-overs all around with 2" dropped spindles. Mike's leather interior. And a whole lot more...
