Delco EST wiring questions...

[alldodge]

Your not going to damage your motor with running it a bit to rich at idle. Being out 2 turns is reaching the point, but having it much farther out and if it does not improve then it's still the carb in my opinion. Air needs to flow across the throttle plates enough to turn gas to vapor, not enough air, it doesn't work right.

Since everything you check is correct (idle rpm, compression, timing, plugs wires, cap) and you don't have a vacuum leak, only thing left is the carb. So if this doesn't work, its back to the carb IMO

 

[Coryb]

Well I just tried richining it up and turned the screw out to 3 turns and what it seemed to do was move the dead spot further out in the throttle. Starts out idling up ok but now hit the dead spot just about quarter throttle when it was right in the beginning. This carb is becoming a pain. Maybe just needs replaced?

 

[alldodge]

Maybe just needs replaced?

I agree with you, but also know that even rebuilt carbs can need some work to get them operating correctly. To clan a carb correctly you need some good caustic cleaning stuff and a soak tank. Even the big carb rebuilders don't give them enough time in many cases.

 

[Coryb]

Thanks for all the very quick responses.

 

[bruceb58]

Well I just tried richining it up and turned the screw out to 3 turns and what it seemed to do was move the dead spot further out in the throttle.

The idle screws are for the idle mixture. As you are finding, they don't do anything for throttle positions past idle. That is when the main jets come into play.

 

[Rick Stephens]

Inspect your plugs again. Make darn certain you aren't running lean in general. Hard on engines.