Wiring for ecu question
On my Rambler with 318 swap I'm wiring in the ecu, the 12v run wire from the ignition switch to the resistor/blue wire to ecu, I get that part, the other side of resistor to the + side of coil, I run an extra wire to it from the solenoid of the starter? For 12v at start up? Am I thinking right?
"Depends" on what you mean "from solenoid." What does it have for a starter / solenoid? Does it have two small terminals, IE the GM or Ford style with "s" for start and "I" for igntion? If so, yes, from the "I" terminal to coil +. If you just hav eone solenoid "s" terminal then you need "something else."
Hooking the coil to the "S" terminal will cause a "feedback" situation, where the coil resistor, when running, will try and power the solenoid, and will cause low voltage to the coil, because of the load. If one "s" is all you have, there is a couple of ways.
{For another thing, what are you doing for neutral safety?}
One is to use a solenoid, obviously, with the "S" and "I" terminals. If you need neutral safety, there exists a Ford style solenoid/ relay with a 5th terminal just for torqueflites in AMC products, WITH the "s" terminal
Another is to come off the "S" terminal to the coil, and wire in a nice big diode for isolation. Maybe 5A or larger, 50V PIV
