I am wanting to swap the engine out of my 96z (not stock) into my 95 TA. I have a few questions on some things.

Can I use my 96 pcm in the 95? Do I need to swap the knock sensor out of the 95 into the 96 engine?

What are some other things I will need to change? I did do a search but could not find too much on this..

Thanks in advance

 

You should be able to use the '96 PCM and knock sensor. The problem may be with emissions testing because 96 is OBD2 and 95 is OBD1.
To keep it all on 95 standards I'd use a 95 PCM with the correct knock sensor for 95. Not sure if the ks is the same or not. 95 PCM tuning software is so much cheaper too. I have a 96 LT4 with a 95 PCM and it was a simple change over, the crank sensor becomes not used, swap in the knock sensor and the PCM harness is the same.

 

Some differences can be found here.

 

How are the O2 sensors handled between them? That would be my biggest concern. Also, do you leave the crank sensor plugged up or disconnect it?

 

If you put a 96 engine in a 95 chassis using the 95 PCM and the 95 wiring harness, there is nothing to connect the CKP sensor to. The sensor becomes a plug for the hole in the timing cover. There is nothing to do about the O2 sensors. They are on the 95 exhaust system, and would not be altered. No need to address after-cat O2 sensors. I would use the 95 exhaust manifolds.

No need to complicate things by trying to change the 95 to OBD-II.

 

I completely agree with the above. The only thing might be is if he needs different programming for the engine coming out of the '96 and does not have a way to get it transferred from the '96 pcm to the '95 pcm(trying to save some money).

He originally was wanting to put the 96 pcm into the 95 with no mention of transferring the harness. I was wondering how the pinouts of a '96 pcm would integrate with a '95 harness. I suppose it's possible that the rear 02's and crank sensor are on ports that simply have no wires on the '95 harness....but best to make sure before ever plugging a '96 pcm into a '95 harness. Given that, without reprogramming the '96 pcm, it could throw codes left and right.

If he was to simply move the '96 pcm and '96 engine wiring harness(and exhaust setup) into the '95, then there would be no need to worry about programming. Unless....you are trying to get away from OBDII.

 

I've been comparing the schematics in my '96 manual to the screenshots on Shoebox's site of the '95(2/3rd's down page).
4th Gen LT1 F-body Tech Articles

One thing the '95 manual does is define the PCM connectors as A, B, C, and D. The '96 manual labels them as C1, C2, C3, and C4.

I'll try to get shots of the '96 manual up as soon as possible. I don't know if Shoebox has these up on his site, but he is welcome to use any picture I post(as his own) for his site if he finds it useful. They are not as good as a scan of the page, but I suppose it's better than nothing. I'll try to get a hand scanner of some type in the future(the book is too big to go into my flatbed scanner).

Edit:
Here is the link to the '96 PCM pinouts.
http://www.ace1252.com/1996_Z28_Fact...8_PCM_Pinouts/

 

As far as labeled A or C1 (Connector 1), the rest is the same in the PCM Pinouts chart (the differences I added/noted). That's why I did it that way. I saw no need to put up two charts.

example

 

Thanks guys for the help! From the info you guys have posted it looks like I should just get the 95 pcm progammed for for my modifications instead of using the 96 pcm.