I have replaced eveything possible. New rotor, cap, wires, TFI module, coil, and some relay. The motor will turn over but there is no spark. I don't think I'm getting power to the coil, but how can I check this and if that is the problem what is the easiest way to fix it. Sorry for the retarded question but I am so fustrated with this I thought it might be a good idea to get other opinions. Thanks in advance

 

Hello,
Just guessing here, Ford had alot of problems with the control modules. Either located on the inner fender below the master cylinder or the back of the distrubutor. Sorry I can't help more. Which engine do you have?

 

Are you absolutely sure it's a no spark issue and not a lack of fuel issue? Just a thought.

 

Attach a test light to ground and touch the positive side of the coil with the key in the on position. It should light up brightly. If it does, you have power to the coil. If it doesn't, you need to trace that wire back and find where it's damaged.

If it lights up brightly, move it to the negative side of the coil, and have someone crank the engine over. The test lamp should flash. If it does, you're getting spark at least as far as the plug wires at the distributor cap, check the wires. If it doesn't flash, you need to rebuild your distributor and replace the hall effect switch.

 

I have the 351 in it. what is the easiest way to trace that wire back? It runs into a wire sleeve with a bunch of other wires and the goes somewhere. Do I have to cut that sleeve open to trace it back? or is there a easy way to run a new wire? Thanks

 

That wire goes to the ignition switch. You can verify that's the problem by hotwiring it. Run a wire from the positive battery post to the positive side of the coil, and see if it starts. If it does, then you need to find where the break is in the factory wire that runs between the ignition switch and the coil. It could be at the ignition switch itself.

 

I tried what you said. I ran a line from the battery to the positive side of the coil and it still would not fire. Do you have any other suggestions?
Thanks

 

So you have no power to the coil when the key is on, and running a hot wire to the pos side of the coil made no difference? If that's the case, you have multiple problems.

With a hot wire to the pos side of the coil, and a test lamp attached to the neg side of the coil, what happens to the test light when someone cranks it over?