I have a 1999 ford F150 4x4 that is missing.
Example...Going 55 mph at 1300 rpms, when you try to keep the tack at 1300 rpm you can feel it.
The other day my neighbor got stuck in the snow in his work van and I went to pull him out, while idleing waiting for him to attach the chain I noticed it missing then also.
Normally I would just give this truck a tune up but with no spark plugs or wires I can't replace all of the modules. (to costly)
Any help?
Mike L. Speck

 

You know I feel like a total moron! This is my first Triton motor, I've had it for about 4 years and when I first baught it my father inlaw said that it had no spark plugs. He's sitting behind me right now laughing his *** off.

Hopefully everyone out there had a good laugh also.

Mike

 

I know I did.

Plug in a scanner and see if you have any codes.

 

Welcome to the forum Mike

We'll forgive you for asking a newbie question
If you want to tackle replacing the plugs yourself there are instructions and tips at https://www.ford-trucks.com/forums/1...ark-plugs.html

 

2 things:
#1 - These trucks have a definite pattern of failure of the ignition coil 3rd back from the front on the right hand side. It is due to a leaky heater hose clamp directly above it that allows coolant to drip onto the hot coil pack. Ford came out with a TSB to put a new hose clamp on to stop the dripping.

#2 - If the misfire has been consistent, then there should be a code in the OBD system telling the technician exactly which cylinder has been misfiring.

Bonus: You can attempt to discover a faulty coil by measuring resistance with an ohm meter and comparing the values across the board from one to another. Also, when the engine is running you can gently spray a fine mist of water from a spray bottle towards each of the coil packs in turn, and see if the miss develops at idle.

 

Check for codes. If it's a miss on a single cylinder, switch that coil pack with another one. Clear the codes and drive for a while. If it's still missing, see if the code has followed that coil.

Mike