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This is a 1984 Camaro putting a 350 in it with a carb on top.
Anyone know where to land the 4 pins circled in Red coming off the ignition module - at C100 or?
Circled in green 2 pin connection goes to the coil. Now the other 2 pin socket from the coil does that go to 12V ignition, and other pin goes to the tach?
Last edited by 86camaroZ; Apr 4, 2016 at 07:29 PM.
The 4-pin connection goes to the ECM. Doesn't go to C100. Not positive that it's all the same between the 2 dist types, but I think it is. Purple in the original 84 setup is reference pulse input to the ECM from the dist, blk/red is ground, white is spark timing control from the ECM to the dist, tan is module bypass output. You might be able to just plug em together as-is; cant tell, the car one is too filthy to see the wire colors in the pic. Might not be a bad idea to pop that harness out and clean it up before ... it's too late, and it just stays a giant ball of s*** for the rest of its life.
The 2-pin is ign & tach. The original dist wiring in the car has 2 slide terminals that look sorta like that one in the bottom right of the pic, except they're over behind the dist. You need to put the right connector for the small-cap coil on those and plug them onto the coil. Get one from a car/truck at the junkyard or maybe you can get a new one at the parts store. The coil has 2 sets of terminals: one for the pigtail coming out of the dist in your photo, one for the lead just described coming from the car.
The 4-pin connection goes to the ECM. Doesn't go to C100. Not positive that it's all the same between the 2 dist types, but I think it is. Purple in the original 84 setup is reference pulse input to the ECM from the dist, blk/red is ground, white is spark timing control from the ECM to the dist, tan is module bypass output. You might be able to just plug em together as-is; cant tell, the car one is too filthy to see the wire colors in the pic. Might not be a bad idea to pop that harness out and clean it up before ... it's too late, and it just stays a giant ball of s*** for the rest of its life.
The 2-pin is ign & tach. The original dist wiring in the car has 2 slide terminals that look sorta like that one in the bottom right of the pic, except they're over behind the dist. You need to put the right connector for the small-cap coil on those and plug them onto the coil. Get one from a car/truck at the junkyard or maybe you can get a new one at the parts store. The coil has 2 sets of terminals: one for the pigtail coming out of the dist in your photo, one for the lead just described coming from the car.
Good info and much appreciated, except for that last comment in the first paragraph... lol.
For this application of running a Carb, still need an ECM to run the distributor? Will this be the ECMs only function? Thinking about my electric fans..
Gotta get yer RPM-based advance SOMEHOW... you can be sure, the engine won't make max power, won't get good gas mileage, won't feel peppy, will run hot esp on the highway, and altogether will SUCK in more ways than you can dream of, if it's stuck wherever you set the "static" timing.
In a 84 car the ECM isn't connected to the fan in any manner way shape or form.
