1998 F150 with 4.2 L engine. Trips a P0302 code when under load, will not do it idling or just reving. I have changed the coil [ack, plugs and wires. Any other ideas, the truck shakes bad and runs like ****.
Thanks

 

Only thing left is cylinder 2 injector.
Check and seat the connector first, if still an issue consider swapping an injector position.
Good luck.

 

IMRC or IAC

 

Thanks for the ideas, found the problem, new plug wire no good had a break in it. Metered wires and it was no good. Whats the odds same plug as origional problem.
New wire and runs great

 

Good deal. You had the forsite to check new parts.
Saw this happen a number of times over the years.
The wires have carbon filiment cores and can break with a sharp bend.
They normally have a measureable resistance to help with radio noise etc.
A check on AM radio often shows it up as a shot noise everytime the cylinder is sparked.
Good luck.