CCM Disable?
Thread Starter
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
CCM Disable?
Stripping out '90 for race only car.
Wanting to retain stock weatherpak ECM for engine management only.
Has anybody disabled the CCM inputs by programming the memcal or wiring in suitable inputs / resistors so that the bulk of the underdash wiring including the CCM can be removed?
Functions like starter relay can be bypassed , fuel pump etc direct wired.
What about the SIR (Airbag) signal?
Wanting to retain stock weatherpak ECM for engine management only.
Has anybody disabled the CCM inputs by programming the memcal or wiring in suitable inputs / resistors so that the bulk of the underdash wiring including the CCM can be removed?
Functions like starter relay can be bypassed , fuel pump etc direct wired.
What about the SIR (Airbag) signal?
Melting Slicks
Joined: Oct 2004
Posts: 2,283
Likes: 0
From: Leeds Alabama
using stock type pcm you cannot run the car without the ccm. It uses a random logic passcode for the security to power up the fuel and starter. You can override starter then you have no fuel.
Safety Car
Joined: Feb 2001
Posts: 4,397
Likes: 0
From: Looks like I picked the wrong week to stop sniffin glue Orlando
Why not strip everything and use an aftermarket fuel management system, probably easier to tune as well.
Isnt there one on the market called FAST or something?
Isnt there one on the market called FAST or something?
Burning Brakes
Joined: Oct 2004
Posts: 1,019
Likes: 1
From: Weymouth Dorset
Originally Posted by rodj
Bummer ,
looks like I might be going back to the MAF setup from the '89.
Was hoping to use SD.
Thanks
looks like I might be going back to the MAF setup from the '89.
Was hoping to use SD.
Thanks
I used a 91 F body ECM .....#16198262
Harness from Jim's TPI ....http://www.jimsperformance.com/carty3.html
And a VATS disabled prom also from Jim's TPI.
Very helpfull man, and very clear instructions supplied with the harness. I have installed the complete setup into the 84 with no problems what so ever, the only thing that does'nt work is the ave / inst milage on the dash but that does'nt sound like that will be an issue for your setup
.I hope this helps, if you have any questions PM me
Adrian
.
Safety Car
Joined: Dec 2002
Posts: 3,655
Likes: 24
From: Charleston SC
I will try to take a look at how the newer dash gets it's info but the ECM can be made to be stand alone with a simple VATS disable. If it where a 94/95 ECM I could do it for you but the 92/93 requires a chip burn. THe only other thing I can think of is the serial line but I believe that is in parrallel. None of the F-bodys have the CCM and they use the same ECM P/N for the 93 SD LT1. I installed a 95 LT1 into my 84 and everything worked fine, did the harness myself but the newer style dash is differnt and I don't know off the top of my head where the spedo gets its info from.
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Racer
Joined: Feb 1999
Posts: 274
Likes: 0
From: summerfield ( Villages ) FL.
help
my 90 has an sys flashing on the dash
was told it is from a dead battery code in the ccm, remove that code and I am good , but never explained how to remove it
yes the brake light is flashing when my reader is set at ccm
my 90 has an sys flashing on the dash
was told it is from a dead battery code in the ccm, remove that code and I am good , but never explained how to remove it
yes the brake light is flashing when my reader is set at ccm
Team Owner
Joined: Sep 2003
Posts: 25,419
Likes: 2,746
http://tech.corvettecentral.com/2011...trouble-codes/
Racer
Joined: Feb 1999
Posts: 274
Likes: 0
From: summerfield ( Villages ) FL.
thank you
CCM clear procedure is midway down this link. You should have no issues.
http://tech.corvettecentral.com/2011...trouble-codes/
http://tech.corvettecentral.com/2011...trouble-codes/
just reading a book on how to
says there are 6 systems but does not say what one is in a 90 vette
Team Owner
Joined: Sep 2003
Posts: 25,419
Likes: 2,746
Racer
Joined: Feb 1999
Posts: 274
Likes: 0
From: summerfield ( Villages ) FL.
Team Owner
Joined: Sep 2003
Posts: 25,419
Likes: 2,746
Racer
Joined: Feb 1999
Posts: 274
Likes: 0
From: summerfield ( Villages ) FL.
not sure I have a problem , have charged the battery up it is new , I had the wire off the alternator a few weeks ago when it was hot and arked it by mistake , fried the battery , am thinking it fried my float charger to as the battery has always gone dead if I don't start it every few days so use the charger ! the car started fine but on the way home I had a go with another C4 took him but it started backfiring at high RPM's always been a sign of a low battery , took it for a drive after charging it and runs fine , always thought the battery was to small and so is the 105 amp alternator but my meter says it is putting out 14.4 volts !
Last edited by Joe; Jun 29, 2014 at 11:32 PM.
