Truck = 1998 F150 with 4.6L Windsor SOHC

I just completely rebuilt the engine including pistons, rings, timing chains (timing is good; compression @ 180 psi), 2 new coils, wires, plugs etc. and there's no fire at the plugs when I crank it. It turns over good but doesn't start. The fuel pump comes on and there's fuel up to the injectors. Before I disassembled the engine, it still ran good except for one piston. The 2 new coils, wires, plugs were replace before I rebuilt it. I was very thorough when re-installing the electrical etc... and triple checked it all after the engine not firing. Fuses are good. I know it's hard to trouble shoot without seeing the truck but I'm just looking for ideas? The battery has been disconnected for months as I started a long time ago. Computer maybe?


Thanks

 

Did you install the crank sensor trigger wheel? It goes on the crankshaft right behind the timing cover. Is there power to the coils?

 

Yup, installed crank sensor trigger wheel. How would I test for power to the coils?
Thanks for the help, 70f100longbed.

 

Fixed!!! It was the crank sensor that was unplugged; the only one I forgot to plug in. Thanks 70f100longbed cause your questions got me thinking and double checked the plugs.
Runs absolutely beautiful.

 

Fuse 30 supplies power to the coils with ignition in start or run.
The other sides of the coils go to the PCM to fire the coils in the fire order sequence.
If the PCM does not get the crank signal, the PCM cannot fire the coils or turn the fuel pump circuit on..
Good luck.

 

awesome, glad that you found it!

 

Awesome!! It's always the little things that get you.