ECM Removal and associated wiring harness....

[SCPO-PD]

I am in the process of replacing the 305 in my 1983 Avanti with a 350 and am taking advantage of this effort to include the removal of the ECU.  As I was pulling the wiring harness through the fire wall I found a handful of the wires making their way to a double ganged plug / connector vice making their way out to the engine compartment.  This same connector set has wires using the same firewall pass through.  Any clues???  As we know the wiring diagrams for the Avanti are somewhat lacking....  

[ronmanfredi]

It would be helpful to provide a photo(s) of the harness in question.

[AG-R3]

Methinks he is speaking of this

 

[mfg]

Suggestion… don’t remove/alter any of that original wiring… just tie it back using wire ties…..

Unless you are going to ‘show’ your Avanti and do it for esthetics, I believe you’re better off leaving it all intact….

Just unplug and remove the electronic control module….and either manually (or through the use of the many aftermarket kits available) activate your lockup torque converter.

I did the above when eliminating electronic engine controls on my own ‘83 Avanti, which I use for everyday transportation, many years ago… and have had no problems whatsoever!

(also…remove the fuse at fuse box sending power to the ECM…. and, of course, you will need a non electronic controlled distributor and carburetor)