I have a 89 f150 supercab 4x4 with a 351w. I havent had it long, maybe a month. I went out to start it the other day and it would turn over, but not start. I have replaced spark plugs, plug wires,distributor cap, ignition module, rotor, coil, iac, iat and egr sensor since then. It is getting fire and injectors are shooting fuel. I checked the trouble codes and the things I replaced cleared them. I have no idea what next.

Frank

 

I don't mean to be hard assed but how did you clear codes from changing parts if the engine doesnot run?
If your sure fuel and spark has been verified then the only guess I have is the timing chain has jumped a tooth from wear on an engine that age.
Saw it before.

 

replace ignition switch mounted on bottom of sterring column try it fords are nortorious for these switches i have a 88 ford f150 same prob.

 

changed ignition switch on top of steering column and replaced timing chain and gears. When both points were lined up on gears (TDC) I noticed rotor did not point to number 1 plug wire on distributor. So I pulled distributor up and rotated 1 spline to line up with #1 wire. All that work and still no luck.

 

If it turns over and acts like it wants to start or runs for a second or two, see this link. https://www.f150online.com/forums/sh...hreadid=180581
My 99 Crown Vic pulled this on my wife and she had it towed to the house. Found that if I pressed down on the accellerator some then tried to start it, the car ran but I had to keep the idle high till it warmed up. 99 Expedition did it as well but this time she called me and I told her what to do. She made it home and I replaced the valve.

 

Well here is a complete list of parts that I purchased. Spark plugs, plug wires, distributor cap, rotor, ignition module on distributor, coil, IAC, ECT, IAT, EVP, fuel pressure regulator, ignition switch on steering column, timing chain and gears. The problem is every time I would install a new part I would try to crank it, therefore fouling out my new plugs. ( I didn't find this out untill today) So I have no idea what part actually fixed my truck. But it's cranking, idling, and running better than before. Thanks for all the help.