William Bruce Lowry

Last week I drug an 85 302 automatic long bed from a ladies front yard. Story was that her son just did not want it and it had a few problems but it drove onto the trailer. 3 days later It was going down the road after oil change, plugs, cap, rotor, plug wires, radiator flush, gas cleanout with a new filter and a couple of vacuum leaks. I thought all was peachy when it stopped running and melted the wires to the coil. Back checked the wires looking for melted wires and replaced the coil plug.

Working through checking and replacing stuff and am just lost. Still no spark!
Just cannot get the coil to fire.

I have replaced the distributor (pulled a code...14 or 41 one was PIP problem and it was full of rust), new coil and ignition module too.

Still no spark from the coil. Odd symptoms are no signal on pin 5 of the module. Got good 12 volt and ground, PIP signal (pin 3+4 and 6 for ground and 1 PIP). It does show a solid 12 volts to coil in the run position and I seem to understand that in run it should go through a 22K resistor for a lesser voltage.

Pin 5 (coil signal) shows a good ground until the key is turned ON, then it loses ground.

Anyone have a next step for me?

Bruce

vjsimone

in the case you don't have it, see page 29.

http://www.garysgaragemahal.com/start--ignition.html

vjsimone

What does it show while cranking ?

William Bruce Lowry

No flashing. Bumping the starter CAN get a spot with a dim glow that fades almost immediately.

Bruce

vjsimone

Was the replacement Dizzy a re-manufacturer ?

vjsimone

Do you have 12 volts to the Batt/+ side of the coil to Grd. with key On ?

Do you have 12 volts to the TACH/- side of the coil to Grd. with key On ?

vjsimone

The Start Wire is the one you might expect 8-10vdc when the key is in the Start/Cranking position. White/Lt Blue.

The 22K Resistor is on the Tach wire just before the ECA pin #4. DG/Y
Current Limiter Resister I would guess.

vjsimone

You have 12v on pins 3 & 4 ?

And you have a good ground on pin#6 ?

Don't understand what you are saying about the PIP signal....

vjsimone

" I drug an 85 302 automatic long bed from a ladies front yard."

I don't think there are many 85' EFIs without this story of sorts.

Did you replace the Capacitor with your new Coil ?

William Bruce Lowry

Yes to both!