98 C5 program to 01

[bcar]

I have a 98 C5. I know one way to go to the newer program from lets say an 01 is to change the ECM. I read where someone else put an 02 file in their 99 camaro. Can I do the same? or is changing the ECM the only way to use the newer program?

[WS6FirebirdTA00]

You can not just change the file unless you have a '99 or newer.

[bcar]

I always miss it by one year. Do you know off the top of your head if the logging the wideband through the EGR will work on this year model?

[RWTD]

Actually, it's VERY simple to swap to a '99-'02 pcm on your C5. Please see my post #2 and #4 here:

http://www.hptuners.com/forum/showth...985#post168985

[bcar]

I found a PCm on ebay cheap but they guy wanted to charge me way too much to set it up for me, he knew I had a HP tuner but was telling me that he had to program the vin and delete some other stuff. I was guessing programming the vin was all I needed but I didnt know for sure.

[bcar]

http://cgi.ebay.com/ebaymotors/ws/eB...m=220413684597

[RWTD]

That's a cheap pcm, and I doubt he wanted more than $100 to program it, right? $200 or less is a VERY cheap price for a pcm programmed to your VIN.

[Runn WS7]

That's a cheap pcm, and I doubt he wanted more than $100 to program it, right? $200 or less is a VERY cheap price for a pcm programmed to your VIN.

The new PCM must have the right vin or it wont work right?

[bcar]

Right now I would just be happy to know what pin the EGR is, I know it is 55 on the newer ECM but I am not sure on the older

[bcar]

I found it Pin 9

[bcar]

After more thought and problems I am swapping the PCM. I talked to the guy slling them and he said he had less problems doing a swap like this if I went to a 99 PCM. He put my VIN in it with a tech II. Will I have any problems reading or writing to the new PCM? or will it give me an Invalid pair error since it is a 98 VIN? will I have to relicense it?

[bcar]

well it wont let me read the pcm. Is it because it has a 98 VIN? Here is a screenshot

[RWTD]

The pcm needs to be flashed with a VIN from a '99 to '03 pcm. I'd suggest at least an '01 to '03 (the '04 pcm was different). However, the '01+ all shared the same MAF (85mm), which was different than the '97-'00, so make sure you use the correct MAF transfer as a starting point for the MAF that you have. Also, the '97-'98 and '01+ all had larger injectors than the '99-'00.

Also, please tell me that you took the time to rewire the entire harness connections, right? Did you see my previous post up above? Again, as I said above in post #4, please see my post #2 and #4 here

http://www.hptuners.com/forum/showth...985#post168985

Here's the shortcut:

http://www.efialchemy.com/db/02to97pcm/02to97PCM.html

If you didn't do this, it'll NEVER work! However, I am fairly sure you did.

[bcar]

Yes I re pinned the harness. I was afraid that was the problem. Any Idea is a dealer can re flash it for me? All I would be able to do is bring them the PCM.

[RWTD]

You'd need a bench flasher to do this. We can do it for you if you want. I'll send you a PM.

[bcar]

Thanks for your help. I called the guy I bought it from and he is sending me another one that has a matching VIN/OS pair. The only VIN I could come up with on short notice was for a 99, so I will have to use it atleast until I can get my tuner to connect. As it sounds you have done several of these conversions. Have you done a 98 vette? If so should I just turn off the mil for the fuel tank pressure sensor ( think that was it). Also have you noticed the GM manual has a misprint saying I have 2 #2 injectors? One is supposed to be ignition. Also the colors for the wires are all correct except for a few of the ignition wires?
btw I cross referenced my wiring with a 99 vette

[RWTD]

You could have swiped ANY VIN from the HPT repository. Just do a search for a 2001, 2002, or 2003. You'll get more idle parameter resolution with a newer OS, as well.

[bcar]

Yea I could do that. Any comments on my wiring questions?