what the heck is this thing?!

[jekbrown]

yanking the heater/AC system out of my '85 and installing a mohave heater in its place (write-up coming soon!). When I pulled the stock junk out, I came upon this thing. I don't know much about 'em, but that looks like a FI computer to me. Not sure what else is could be, but it can't be that so what the heck is it? my rig didn't come with FI so... what the heck? lol! anyone know?

j

 

[4X4HIGH]

Where is it located? It could be the ECM for the electronic controlled distributor and electronic controlled carb.

 

[1K_yd_Shooter]

If it was up under the dash behind the glove box it is the ECM.
I just pulled mine out to put in an aftermarket heater also.
Dennis

 

[dyeager535]

Thats an ESC controller. ECM's are larger.

 

[jekbrown]

ok, what does it do? do i need it? lol!

j

 

[pauly383]

ok, what does it do? do i need it? lol!

j

It adjusts your timing , was useful to GM to keep the 305's from pinging on cheap gas with their 9.2:1 compression . If you do not have a computer controlled carb , get a regular HEI distributor and forget about it . I left mine in there , but the distributor is in a box in my garage

 

[jekbrown]

yeah, back in the day I had my 305 removed and a crate 350 put in. One of the plugs (5 or 6 wires) that comes out of this thing has always been disconnected and just kind of hanging there behind the engine by the firewall. I have all the stuff to go TBI, including the tbi distributor. When I do the swap, I won't need this thing at all anymore, right?

j

 

[bigcat44]

Don't mean to get off topic but if you guys are getting rid of your stock heating stuff I am in need of the stock stuff behind the dash that controls where the air flow goes. Give me a price because right now I can only direct airflow to defrost. I have the tubing and the actual vents I just need the large black box that distributes the air!!

 

[dyeager535]

No you don't need it with TBI. But keep the "bracket" it sits in for your ECM.

Knock sensor, timing, all handled via the TBI system as one, not standalone like ESC.