bizarre p1391

[hotkarl]

A few months ago check engine light came on, of course just as state emissions inspection was due (automatic fail if light is on). No driveability issues either. Ran fine.So I scanned it, got the p1391.
Changed cam sensor-ran like ****.
Changed crank sensor-ran like ****.
Changed TPS sensor and IAC and still ran like ****.
Changed all and combinations of all and still ran like **** and of course with light still on.
So right now I put all the old parts back on and it runs fine, but the light is still on.
All plugs and wiring appear fine.
Im at a loss.
Anyone have a clue before I drop probably a grand at the dealer to resolve this?

It's an '02 4.7

 

[hotkarl]

Forgot, new sensors are Mopar.
Engine had been replaced(new) a few years ago, probably has 30k on it.

 

[Karlsweg]

Wonder if it jumped time?

 

[hotkarl]

Anything is possible. Motor is fairly new, not that means anything but...

The thing that baffles me is that it runs fine with the old sensors but like garbage with new sensors. I think even if it skipped a tooth or something it would run the same with old or new sensors.

 

[hotkarl]

Junked it and bought a 92 F250.