1987 318 Tuning with Summit Carb

crackedback said

Does the OP know someone with a known good carb they could try, already running on something. Don't jack with it, just install it, fire it off and see if it acts the same way.

I thought that was a 4150-4160 carb. Doh! It's one of those motorcraft copy carbs, friend had one many years ago when summit first started selling them, a trash can would have been a better carb.

Run the float level down half a turn, see if that helps. That cam is so small, you shouldn't have to dick with anything on the carb to get it running. 12-14 initial and it should idle smoothly around 700-800 easily.

Something, somewhere is royally F'd up.

Trigger wires from distributor reversed?

I tried... good luck.

Click to expand...

I have the 600 Eddy that was replaced with the Summit carb. I decided to replace it because the throttle shafts are pretty worn and I wanted to take a crack at tuning a Holley style. I had the Eddy on two days ago after I fixed the ignition and was able to fully adjust the mix and speed screw as normal. So when I turned in the mix screws on the Eddy, it died. With the Summit carb, it won't die with the mixes all the way in and the speed screw in just 1/4 turn. I don't get it.

I actually have the floats lower then what the manual says. Spec is supposed to be middle of the sight glass, I have them set at the bottom.

Just redid the ignition and double checked the wires from the dizzy before splicing them to the MSD harness.