BOTTLE ROCKET

iTrader: (4)

I swapped out my 98 PCM for a 01 in my 98 vette. I did the wiring portion and then did a write entire and started changing over the settings. I tried to start it last night but it wont start and is giving me a 1631 (incorrect security password) What else do I need to do?
I read where someone mention that you have to change the VIN, but I thought that if I use my credits and downloaded the PCM info, that would be it
Can someone help me out?
Thanks

BOTTLE ROCKET

iTrader: (4)

Got it
I found an artitcle about turning on and trying to start, then leave it on for 11min and off for 30secs and repeat 3 times so it can communicate with the BCM, and it fires up
NOW.....
MAN; this thing wont run. It will barely idle, and when I give it throttle, it smoothers and revs a little when I release. Ive commanded around 24* timing at idle (same as before the swap)but its only around 12-15.
Guess I may have to go back and look at the wires that were swapped.
It gave a couple of codes but now nothing really and it seems like it show codes if wires were not right.
Sometime I think I should have left it stock!!

mrvedit

Please confirm that you tried your best to copy each of your 98's tuning tables to the '01 PCM. Did you remember to change the engine size?

BOTTLE ROCKET

iTrader: (4)

I tried to copy every table. Obviously the 01 is more detailed on some areas, but I literaly had 2 laptops open, one with my old tune and the other with the 01 so I could compare the tables one by one.
I will admit I don't remember seeing a "engine size" but although I got it, I did almost missed the tranmission change

There is a HUGE difference in the pin outs. They are not even close. They will go from Blue on one PCM, to red on the other.
It was a REALLY time consuming job.

mrvedit

I documented (and slightly corrected) an old thread about changing the '98 Fbody pinout to a '99+ pinout here:

https://ls1tech.com/forums/pcm-diagn...cm-0411-a.html

Is this what you had to do with your C5?

BOTTLE ROCKET

iTrader: (4)

Yes
I purchased extra set of connectors so I could pull one pin out and put it directly back in the new one. I checked it several times as I was performing the swap and it was correct, so I was hoping it was something in the tune that was causing the issue. I REALLY don't want to go back through the wiring again
BTW- it is set for 5.7

mrvedit

And did you get the addition I added on April 2, 2015 concerning the IAT:

C-2 cav 8 TAN to C-2 cav 25 IAT Sensor Signal In Pin B (added by mrvedit)

Why is your engine size set to 5.7 when your signature says it is an LS2?
Fueling will be 5% lean then.

BOTTLE ROCKET

iTrader: (4)

I did NOT see that. I will check on it
I was told by a guy that has done the swap on a few cars, to just list it as 5.7. and tune it out. My VE tables should be correct because the car was previously tuned and the VE tables were pretty much dead on.
Im somewhat confused as to why I am getting no codes on a car that will barely stay running. I guess I will recheck everything this weekend and go from there.

RonSSNova

iTrader: (3)

You can datalog IAT. If not wired correctly, it will read -39f or something like that. The engine will run terrible.
Ron

BOTTLE ROCKET

iTrader: (4)

If I can keep it running long enough
One of the things I noticed was the timing was reading really low. I have idle timing set around 24* and it logged (while it ran) at around 14-15*
Just feel like Ive missed swapping something over in the tune. Don't have time to work on it during the week, so I am trying to do my research so I will know what to look for..

BOTTLE ROCKET

iTrader: (4)

Just looked at a short log I did that was still on the screen and the IAT is working properly

douniasg

iTrader: (10)

hope you get it running right
I will soon be doing the swap myself for my 98 vette
just waiting for the new ecm to be delivered

BOTTLE ROCKET

iTrader: (4)

Its a process
Its running but has some issues. Havent driven it yet to see if the wheel sensors on the 98 will communicate with the new PCM.
Having some idle issues I hope to work out. Will ask the guys here about it.

BOTTLE ROCKET

iTrader: (4)

I just compared the pinout I used to the one in this tread and there are a LOT of differences. On just the blue terminal, there are proably 8 discrepancies between them
Not sure which one is right now.....

mrvedit

Note that is documented as a '98 Fbody PCM swap.
As I posted earlier, I thought based on PCM pinout documentation (but apparently incorrectly) the '98 to '05 Vette PCMs all had the same pinout. Edit: This is now known to be incorrect.
Therefore it appears the '98 Vette is different from later years and perhaps different from the F-Body.

PM me those 8 discrepancies and I will research it.

2xLS1

iTrader: (25)

97-98 vettes and 98 F-bodies use the same PCM. 97 Vettes may have a different service # but you can still mix and match any of them. Some pinout differences are going to be ETC TB vs cable TB with IAC, no EGR on Vettes and EGR on 98-00 F-bodies. May be others. And 99-03 Vettes use a P01 pcm (blue/red), 04 Vettes use a P59 pcm (blue/green) and 05 Vettes are going to be LS2s with a E40 pcm,

mrvedit

That makes sense. An earlier edition of the printed "Custom Stand Alone Wiring Harness Guide For the GM Generation III" by F-Bodies Inc therefore had completely wrong info for the "1997-2005 Corvette Pins". I see that their latest edition removed the Corvette info.

Bottle Rocket: This makes me more suspicious of your 8 discrepancies as I am confident the swap guide I linked is accurate.

BOTTLE ROCKET

iTrader: (4)

Here are two corvette specific sites and both are different. I wish it was different. It would end some of this aggravation

http://corvetteforum.shelor.net/Corv...ts/Default.asp

https://ls1tech.com/forums/stereo-el...u-pinouts.html

uscav82

With year make model I can pull the diagrams from Alldata for both PCM's.

BOTTLE ROCKET

iTrader: (4)

I have a;

98 Corvette

I am installing a

01 PCM (from a corvette)

Thanks guys