'83 305 No more ESC, but now it is dieseling

[Trucksareforwork]

I'm late to the party on this one but in my truck's case, dieseling was the result of a bad vacuum leak. Perhaps check those vacuum lines if this one is still happening.

 

[Hugomartin]

Is the esc the same as the Ignition module?

 

[scrap--metal]

Is the esc the same as the Ignition module?

ESC is electronic spark control. It's a system designed to retard timing if the engine detects knocking. Vehicles with ESC use a specific ESC ignition module in the distributor. I think it has 5 terminals instead of 4 like on typical HEI ignition modules.

The system consists of more than the ignition module though. I hope this help.

 

[48hd]

Bypass the esc, make sure your vac advance only gets vacuum when you gas it, not full time vac. and no one way valve to the vac advance.