Removing unused wiring - Transmission wiring?
#1
Removing unused wiring - Transmission wiring?
I have a 1985 firebird (originally 5.0 with 700r4). I have swapped the quadrajet for a holley and the esc dizzy for a vacuum advance dizzy. I have removed a LOT of the unnecessary electronics. My question, is what signals are used by the ECM to shift the transmission? I want to remove as much as possible without interfering with the shift points and the lock up torque converter. Could anyone tell me if the ECM uses the vacuum sensor (MAP), baro sensor, vehicle speed sensor (behind the cluster), etc...
I do plan to keep the ECM for the coolant temp, oil pressure, and other various things. Mostly so I can see that stuff myself. None of the engine is computer controlled at this point.
Any help is appreciated!!
I do plan to keep the ECM for the coolant temp, oil pressure, and other various things. Mostly so I can see that stuff myself. None of the engine is computer controlled at this point.
Any help is appreciated!!
#2
Supreme Member
iTrader: (167)
Re: Removing unused wiring - Transmission wiring?
what signals are used by the ECM to shift the transmission?
If you have removed the ECM than you have already lost your TCC lock-up function. It's a good idea to buy a ( factory or aftermarket ) kit to get your TCC lock-up working again.
I do plan to keep the ECM for the coolant temp, oil pressure, and other various things.
The following users liked this post:
Tidan (01-28-2020)
#3
Re: Removing unused wiring - Transmission wiring?
Thank you VERY much for your input. Good information here. According to wiring schematics, it appears that the coolant temp and oil pressure wiring goes through the pcm and then to the cluster. Is there another way those are wired up, or am I reading them incorrectly? That wiring has not (yet) been molested.
Again, Thank you for your help John!
Again, Thank you for your help John!
#4
Supreme Member
iTrader: (167)
Re: Removing unused wiring - Transmission wiring?
I don't have the 85 Firebird schematics to look over,..... but MOST ( if not all ) carb cars had the coolant temp and oil pressure wires running thru the C100 firewall connector.
Here is a schematic of the 85 CAMARO C100 Drivers side firewall connector ( you can check your 85 Firebird C100 plug to see if the coolant and OP wires are in the same spot )
Oil Press = 'E5' TAN wire
Coolant = 'F7' GREEN wire
Glad I could help,..... .Good luck !!
Here is a schematic of the 85 CAMARO C100 Drivers side firewall connector ( you can check your 85 Firebird C100 plug to see if the coolant and OP wires are in the same spot )
Oil Press = 'E5' TAN wire
Coolant = 'F7' GREEN wire
Glad I could help,..... .Good luck !!
The following users liked this post:
potterc32 (02-04-2020)
The following users liked this post:
potterc32 (02-04-2020)