I parked my 1979 bronco with a blown c6 trans. Truck ran fine when i parked it,so i changed the trans , no problem. Now the truck only srarts once in a while. here are the symptoms i have encounterd. When i first tried to turn the truck over i would get one spark as i released the key. I am not getting spark as it turns over,no fire. (tried this many times) I checked for spark many times,and from time i get spark and the truck starts, runs fine. Then it goes back to only one spark as the key returns to run posistion from start. Another symptom is, every so often the starter keeps trying to start the truck even with the ignition turned off. Please help turn my Mule back into the Bronco it was. I miss her so.

 

replace the start solenoid on the fender

 

that is where i thought i had a problem being that most of the ignition system wires lead back to there so i replaced that and had even more of a problem , my wirring harness started smoking, dissconnected battery and have come for help.

 

I have changed the altenater reg, srarter relay,had my ignition module tested(it checks out ok),changed the coil, i even changed the whole entire wireing harness including all sub harness's in motor compartment. could my throttle actuator be part of the problem? I also changed the neutral saftey switch,engine is grouded to cab.

 

Please help me.

 

Check all wires and connections. The solonoid is also a good place to start.

 

oh sorry, I didnt read the rest of the forum before I posted, sorry. Im as lost as you are........

 

It sounds like you checked everything out.

With out looking at it it sounds like the Ignition switch under the instrument panel. How about the negative battery cable? It might be a ground problem, As you said you checked the engine to frame ground. But if the Negative cable is old or corroded it might be causing problems for the whole electrical system.

You might be close with the Throttle Actuator or more importantly the brown wire running from the starter relay to both the Throttle actuator and the positive side of the coil. From the diagram in my chilton manual that is the only source for voltage to the coil. Hope this helps.

Harlow

 

Thank you Harlow,i will be checking the brown wire again as well as the rest of the ignition wires. I did change the ignition switch but not the throttle actuator. I will check all my grounds. thanks for the tips , i will post more when i know more about this gremlin.

 

Ureeka i found the problem. It was the distributer all along i changed it and the truck starts every time. I'm so happy it's over.