1991 F-150 won't start

[agco85]

I have a 1991 Ford F-150 with a 5.0 liter. The other day I went to start it and it wouldn't start, and I found I had no spark by testing it. I have checked the ignition module on the distributor, and I have replaced the electronic piece inside the distributor with a piece from a working distributor. I have also hooked up a different coil and condesor from a different engine, and my truck still won't start. Any suggestion would be appreciated.
Thanks in advance.

[reree]

Might be a bad distrubuator, mark it, take it out, have someone look at it, it must be put back in on the exact marks that you took it out.

[17ford]

check for good connection at module and if your getting voltage at module

[mrjlturner]

I'm having the same exact issues on my neighbor's 5.8 litre engine. We just replaced the coil & EEC module on the distributor today with no success. Here's the strange thing. We are getting spark when in the key "run" position, but when you turn the key to the "start" position to crank the engine, the spark stops. All electrical troubleshooting using manual has turned up positive without issue. Any further ideas?

Thanks!

Originally Posted by agco85

I have a 1991 Ford F-150 with a 5.0 liter. The other day I went to start it and it wouldn't start, and I found I had no spark by testing it. I have checked the ignition module on the distributor, and I have replaced the electronic piece inside the distributor with a piece from a working distributor. I have also hooked up a different coil and condesor from a different engine, and my truck still won't start. Any suggestion would be appreciated.
Thanks in advance.

[17ford]

it might be something in the ign switch itself

[mrjlturner]

Update: It turned out to be a shorted wire in the wiring harness. It took a mechanic about 3 weeks to find it.

...my 2 cents

Originally Posted by mrjlturner

I'm having the same exact issues on my neighbor's 5.8 litre engine. We just replaced the coil & EEC module on the distributor today with no success. Here's the strange thing. We are getting spark when in the key "run" position, but when you turn the key to the "start" position to crank the engine, the spark stops. All electrical troubleshooting using manual has turned up positive without issue. Any further ideas?

Thanks!

[FNA]

It was not uncommon, (before the 91 model was when I was in business) for the ignition module, the electronic control unit itself to fail

[wolf9304]

yeah i kind off had the same problem mine was the ignition switch so i put in a push button to start my truck 88 ford f150 302 5.0