Adding Holley multi port HP EFI can my stock 1995 4l60e computer still control the transmission?

[Whittaker]

Adding an older Holley multi port HP EFI to my 406 in my 1995 K1500 can my stock computer still control the transmission? Or do I need a separate controller. It has a chip in it and I was fine with its shift points. The ECM and TBI just didn’t do it on the 406.

So the throttle position sensor and what else would the stock ECM need?

 

[Supercharged111]

RPM signal and TPS and I think you're good. Power and ground too of course.

 

[PlayingWithTBI]

Maybe VSS too?

 

[Whittaker]

Maybe VSS too?

So I should run from the transmission VSS to the ecm? Then the TPS, RPM signal also to the ECM to keep it knowing what the engine is doing.

Thanks for the help,

now to find the wiring to keep and what not to use.

 

[TagAllen]

I just recently got rid of my Fuel injection. I still use my stock computer to control the transmission. My trans is a 4l80 but your 60 needs fewer wires. My truck was originally a 4l60.

Will you still be using the stock ECM to control the distributor?

 

[Whittaker]

I just recently got rid of my Fuel injection. I still use my stock computer to control the transmission. My trans is a 4l80 but your 60 needs fewer wires. My truck was originally a 4l60.

Are you using a carb then with a remote TPS or one off your throttle shaft?

how did you wire it?

 

[TagAllen]

I am using a Holley style Carb from Summit. With what is called a TPS kit. It mounts on the throttle shaft next to the choke. It uses a stock TPS so no custom wiring was needed Just plugged it in.

https://www.summitracing.com/parts/hly-534-202

But depending on what TPS you are using with your EFI kit you might just split the TPS signal with a TPS breakout.

You must be registered for see images attach

https://www.summitracing.com/parts/cei-108103

 

[TagAllen]

Also the stock ECM may need the temp sensor in the intake to remain intact. I kept it but opinion seems to vary as if it needs it.

 

[Supercharged111]

Without seeing TBI software I'm highly inclined to saying it's RPM, VSS, TPS, and maybe trans temp. Trans temp has a say in the Vortecs if they get too hot. RPM is used for WOT upshifts, VSS for part throttle on the Vortecs. Cruise control also dictates an alternate shift pattern in the Vortecs, but I have my doubts there for the TBI stuff.

 

[TagAllen]

Without seeing TBI software I'm highly inclined to saying it's RPM, VSS, TPS, and maybe trans temp. Trans temp has a say in the Vortecs if they get too hot. RPM is used for WOT upshifts, VSS for part throttle on the Vortecs. Cruise control also dictates an alternate shift pattern in the Vortecs, but I have my doubts there for the TBI stuff.

TBI does not have access to the trans temp as far as I know.

Clarification. I dont know if it does. But even if it does it would be through wiring that would remain intact even if you remove the stock FI system.