Eurospec2

iTrader: (2)

Hello!


First thing you will need to disconnect the battery and jack up the front of the car. Remove the passenger front wheel and the splashguards behind the wheel and Viola your staring at your PCM! The first pick here is what youll see, i have already removed the PCM and the brackets and pulled back the shielding from the wire looms.





This is where the fun begins, and it REALLY helps to have a partner with a label maker for this step. Plan for this to take the better part of an afternoon, this is not something you want to rush. Basically, you take apart the PCM connectors and 1 by 1 remove each pin, Labeling as you go. What i did was i looked up the pin on the 97 PCM Pinout schematic i had, read what the signal was, found that signal on the 2000 PCM Schematic and labeled the wire to where it would need to go back into the connector for the new PCM. YOU DO NOT HAVE TO CUT ANY WIRES, all you are doing is removing the wire from connector, using your pinout diagrams to figure out where it would be in the connector for the new PCM and after they are all labeld reinserting them into the connectors in new locations. Here is a pic of what youll be looking at after labeling




Now, once they are all removed and labeled with there new locations, all you do is start reinserting them into the connectors in there new homes!





Once you have them all re-installed you can go ahead a wrap them back up to make them nice and neat and weatherproof






after your done wrapping, you can put the connector backshells back together and install your new PCM brackets into the car




then, install the new PCM and connect everything back up and VIOLA you are done!






Easy right? well yes it isnt that difficult, i cant stress enough taking your time if you try this yourself when you are removing and labeling the wires, that is the most critical step.

lastly, there is some programming involved in this. Obviously the new PCM will need to be flashed with your Vin, and you will pop fuel tank pressure sensor codes when you activate the newer Corvette operating system in the PCM, this is due to the 97-98 Corvettes do not have the tank pressure sensors installed, so simply program out those codes and you are good to go.

So, now you have a 99-02 PCM in your 97-98 Corvette! Youve opened a whole new world of tuning oppurtunitys for your car, expanded VE tables, Custom operating systems from EFI LIve and you can real time tune with tools like a Moates Roadrunner!

Beaflag VonRathburg

iTrader: (176)

After reading that there's no way in hell I'd be able to do this being partially color blind.

staringback05

iTrader: (8)

i wouldnt be able to do it due to the patient factor

2MuchRiceMakesMeSick

holy dog mess thats one big spaghetti lunch you got there

tunedportcj5

iTrader: (18)

Hopefully your car won't contract an ETD (electronically transmitted disease). That Moates Roadrunner has been used more than hooker on a troop train!

JoeyGC5

iTrader: (24)

That makes some of those 97's look oreinteresting now

ls1290

iTrader: (20)

You do not want to flash a 97/98 into a 99+ PCM. The table structures and layout are completely different. LS1Edit or HPTuners will freak out when it reads the 97/98 vin from the PCM and trys to a 97/98 table structures into a 99+ PCM. That is a good way to wreck a PCM.

Keith

Eurospec2

iTrader: (2)

your absolutely correct, and thats why i did not use HP Tuner or LS1 Edit. BUT with EFI Live you can flash a 97-98 VIN Into any 99-02 operating system and it works just fine.

ls1290

iTrader: (20)

I am not following you around You left out these important facts in your post. If someone tried to do this with LS1Edit or HPTuners, they would wreck their PCM.

Keith

tunedportcj5

iTrader: (18)

Hmm - my '98 VIN doesn't have any problems with my '99 ECM running OS5 with a 2002 calibration file.

bluecajun5.3

iTrader: (31)

Doc

iTrader: (9)

tnsyty

Pretty good info. How much tuning differences are there with HPtuners in my 98 vs 99+ PCM? I am glad that this swap is possible do to fewer used 97,98 pcms to replace mine if it ever goes dead.

Doc

iTrader: (9)

well heres the deal with that, there is a HUGE improvement in tuning options with the 99-02 PCM compared with the 97-98, but unfortunetaly this swap cannot be done with HPTuners, it can be easily accomplished with EFI Live, so you would have to switch tuning suites

thosewhohatedmecreat

Now make a guide for a camaro! I heard there are a few things ya gotta change...

Eurospec2

iTrader: (2)

Nope, its exactly the same swap physically just the PCM is in a different location, nothign else has to be changed. Theres is a couple differences in the tune for a camaro, but no other parts need to be changed.

if you want details PM me ill explain what the tune differences are.

thosewhohatedmecreat

I heard something about the fuel gauge though... total bs?

TLKSCHP

Since I use EFI LIve does this mean with the 98 Vin flashed I don't have to buy a 99 or vin newer license. still falls under the free 97-98 tuning.

Eurospec2

iTrader: (2)

No, the license is attached to the serial number of the PCM, so you will have to pay for the 99-02 license.

Eurospec2

iTrader: (2)

For the vette the fuel guage is not a problem

For the F-Body it is slightly different, but it is all fixed in the tune by swapping a different fuel segment into the PCM to make your fuel guage work.