Hey,

I have an 86 F150. It will crank over but it will not start. I did get it to start a couple of times but after about 20-30 seconds it will quit. I have already replaced fuel pump, and both fuel filters.

This has been a battle for about a month of working on it off and on.

I am at a loss of what to do, so any help is greatly appreciated.

Thank you

 

Can someone please give me a suggestion of what route to go from here? I am not really sure what my next move should be. I do not just want to throw money at it.

 

How's yer spark? Peace, Dave.

 

Is it EFI? I've had a few '86 5.0L trucks/broncos. I had a similar problem with each of them, it always turned out to be the "ignition module". If I remember right it was some little gizmo that bolted on or next to the distributor. Fixed it right up. Sorry, but it's been 10 years since my last '86 Ford, so the details are a little fuzzy.

Also, I always had to carry spare fuel pump relays (though that doesn't sound like your problem if you have fuel pressure)

 

Yes it is an EFI. Thank you for the help and giving me a place to start at least.

If anyone else has anything that may also need to be check let me know


Thanks

 

So, I checked for spark and found no spark. So i replaced the ICM. However it still will not start. So i bought a coil, still nothing, So that one is going back. However i do not know where to go from here again.

Can someone please help me

 

This is just a guess mind you, but I had a problem with my 90 with the same symptoms. Turned out it was a fuseable link that supplied the computer with power. It would crank all day, but not start. Sorry, I can't tell you where it is.

 

I had a similar issue due to a rotted body ground. T^he thin black wire that runs adjacent to the major ground wire. I Also had issues with the fuel pump relay, it would kick on enough to get it to fire, run sometimes for minutes or as short as a few seconds, or not at all