Faulty IPC sensor without code?

[Mountain Synergy]

Is it possible to have a bad IPC sensor, and my scanner is not giving any code? If I pull the wire off of it, I get code P1280. Plug it back in and reset.....then no code. But my truck is acting like the IPC is giving false readings...

[sldghamr]

do you have any symptoms??

[SCUFFY828]

are you unplugging icp sensor or ipr solenoid

[Mountain Synergy]

Unplugging ICP sensor. And symptoms are some loss of power, and if I rev engine in park(or neutral) to 2000 rpm or so and let off, has trouble returning to idle, sometimes it will die and sometimes it barely recoups back up to idle. And when idling it tends to float up and down between 500 and 700 rpms.

[Mountain Synergy]

Also does better before engine warms up

[SCUFFY828]

well , if it were me i would want to make sure fuel pressure was ok, then i would get it o a scanner , i would like to know what the voltage is on the icp and the duty cycle percentage of the ipr with the key on and engine off , the symptom you are referring to makes me think ipe valve sticking , but yes could still be icp sensor acting up, neither part is cheap so i wouldnt want to just buy parts withot knowing which one was bad

[sldghamr]

i had those symptoms a few months back, ended up being the Injector Driver Module (IDM) was dying. It is a Ford only item, the IH version of the IDM won't work on our trucks.

[Mountain Synergy]

Thanks, I think I'll go back and read up on testing the IPC, and might pull the ipr valve to check o rings.

[SCUFFY828]

Originally Posted by Mountain Synergy

Also does better before engine warms up

what is the condition of the oil

[Mountain Synergy]

oil condition.........change it every 5k with rotelaa, and just changed the oil in the hpop res. was black, but not as bad as I was expecting.