OBDII conversion in progress.

[3400-95-Modified]

I gave up on the OBDI idea and decided to just gut a 96 beretta for the engine harness and ECM and other misc stuff needed.

So does anyone have a OBDII swapped beretta running at this time?

I know Erich had his DGGM running on OBDII but its not running anymore due to engine fire, but I wasn't sure if there were any other successfull swaps out there?

[bszopi]

Although you'll be able to tune with the DHP, by using a 96 PCM you will be limited with what you can do. If you can find a later PCM (98 I think?), you'll have more options.

[SappySE107]

I am always hearing that the 97 grand prix is the one to get as it has the most code available for that ECM. Truth or not, beats me.

[Azrael]

I'm still toying with the idea of doing this if I keep my car for more than another year. The ECM from a 97-98 grand am should work for your application too. Same engine and transmission.

[geldartb]

instead of creating 2 topics on the same thing ill post here seen as how we are working together on this swap with both our cars.

im doing the same as 3400-95-modified as far as going obd-II. so with the 98 grand am pcm is there any problem with getting it running. i mean as soon as i get the harness in there it should be plug and play right.

[5speedz34]

Didn't Josh, finish his OBD II swap?

[Darin]

Ok, If this helps, I have a Wiring harness and PCM from a 99 Chevy Lumina 3100 car. I will sell complete, I was going to use it on my 94 Grand Prix project but I sold the car, and and now building a 99 Grand Prix with a 3100.

PM if interested in buying it.

[Darin]

I am always hearing that the 97 grand prix is the one to get as it has the most code available for that ECM. Truth or not, beats me.

Ben, I have heard the 97 and 03 Grand PRix PCM's were the "bastard" PCM's of the 97-03 Grand Prixs. I could be wrong though.

[3400-95-Modified]

I'm also curious on this using a newer PCM... How can you do that? Does it still retain the same pinouts as far as engine harness wise, I'll be using a 96 engine harness on this.

[Darin]

I'm also curious on this using a newer PCM... How can you do that? Does it still retain the same pinouts as far as engine harness wise, I'll be using a 96 engine harness on this.

I would think using a newer harness would be easier, Then all you would have to do is change a few pins at the fire wall, if any at all.

[3400-95-Modified]

I thought a newer harness would be worse... for one a beretta doesnt share the same body harness plug as a grand prix, or even a grand am... then on top of that a beretta doesnt have a body control module so there would be the security issues to deal with... I think I'm best sticking with my 96 harness, ECM on the other hand I'm still curious on if you could use a new one on a older harness and if its the program that determines the pin outs.

[Rhedalert]

the '98+ PCM has completely different pinout locations. HOWEVER '96-97 are completely interchangeable as far as my car goes. 16211539 IIRC for '96 and 16217058 for '97. So if you have #16211539 for a '96 Beretta then you're ok. The '97 has double the memory (512kb) you can modify a lot more, and has provisions for performance shift (separate set of shift points, etc) In fact the performance shift tables might be the only difference between the two (there's a lot of tables for just the tranny).

Also just so you know (if not mentioned) the knock sensor, trans gear switch/safety switch, and ECM coolant temperature sensor were different for '96+ and I had to change those. Technically the trans gear switch functions the same, and I did wire it in and use it briefly, but the plugs are different.

[3400-95-Modified]

Oh I know all the differences dont worry
ABS, Knock, Trans Switch, Purge equipment, aready running 3 pin coolant sensor.
When I gutted the 96, I grabbed everything that looked different... I'm glad I looked at the purge stuff and also at the trans switch
I already have all of that covered... I just need to run some power wires for the ECM on my interior harness.

[Rhedalert]

actually I noticed the extra purge equipment but didn't grab it nor install anything. The PCM has not cared. I think it's only there for manual testing purposes so I've read.

[3400-95-Modified]

Purge stuff wont throw a code anyways, I had mine hooked up wrong and it didnt care really. Either way I grabbed everything since I wont have the DHP to tune it right away... It will have to run on a stock tune for a while and work right.

BTW whats your regrind specs if you dont mind me asking