I am putting my 1985 D150 back together and I can turn the motor with the starter, everything (New Coil, ECU, Voltage Reg, Ballast) has got power like it should, and have double checked all the grounds after painting. I have no spark coming out of the coil which leads to no spark at the plug. I have checked everything twice and can't find a problem. Looking for help or a direction to go.

Thank you!!!!

 

Have you run resistance checks on the pick-up in the distributor?

 

I did but wasn't sure of the reading between my Haynes manual and what my meter was reading, since I didn't have the same scale as the one they showed. Going to try another meter with better readings. But i check the pickup coil on another dist. that I have and it read the same?? maybe both are bad....

 

First lets figure out what system you have. Is it a 4 or 5 pin ECU. Is it a single or double pick-up coil. Is it a single or dual resistor? Please be specific and answer all 3. I know what you should have but I need to be sure what is in your truck as it may not be stock.

What were the resistance readings you got?

 

4 Pin ECU
Single Pick Up Coil
Single Ballast Resistor
40 ohms....

 

Brand New Coil

 

Do you have power at the positive terminal in the coil?

 

I have voltage on the Positive and Negative terminals

 

That is low resistance for the pick-up but the chances of two different pick-ups having the same resistance and both being bad are small so I think it is your meter. Is the air gap set correctly using a non metallic feeler gauge?

The connector pins on the ECU form a pointed end and a round end. Pin 5 is in the rounded end beside the missing pin position. Do you have continuity from pin 5 to a known good ground?

 

Haven't checked the air gap yet, the dist. came from a running engine, and yes I have continuity from pin 5 to ground. Now you understand my confusion and frustration....