MFDES

Gearhead · Apr 23, 2015

Powerstroke1098 said:
My trucks wicked choppy and not even clean.. what could cause everything to be too high?

not sure honestly..... those tunes are pretty well sorted out but every truck is different. Check the basic stuff first like oil in the ICP sensor connector etc.

Powerstroke1098 · Apr 23, 2015

Ok I will, i'm going to try to do a bunch of testing this weekend and I have another truck and i'm going to try swapping things if anything seems suspect, hopefully I find something, thanks.

golfer · Apr 24, 2015

see lots of issues with non Ford/Motorcraft UVC gaskets, UVC wiring...and non FoMoCo cam sensors..

not sure if you changed any factory chit with aftermarket parts when you did the upgrade...

bigfords · Apr 24, 2015

Your ICP seems high. My truck idles very choppy at 750 psi, and idles much smoother at 500 psi or so. This is with 100% nozzles though...

Powerstroke1098 · Apr 24, 2015

What could cause such high ICP? a faulty IPR not letting enough oil bypass? my UVCH's are the originals that were on the truck, and the cam position sensor is the recall unit from 03ish, I had a new CPS I got from ford (where I work) but that one failed so I installed the old one that I had replaced just because I got a free CPS. Thanks for the input with this everyone.

Arisley · Apr 24, 2015

Could be a faulty IPR or a Faulty ICP sensor. Unplug it and see if anything changes.

Powerstroke1098 · Apr 24, 2015

It has a very little hiccup, but nothing changes when I unplug the ICP sensor.

Gearhead · Apr 24, 2015

If the injectors need a little more pw down low than what they are tuned for, the MFDES will be high and thus the ICP.

Powerstroke1098 · Apr 24, 2015

So I may need to send it in of I can't find anything.

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Arisley · Apr 25, 2015

Powerstroke1098 said:
It has a very little hiccup, but nothing changes when I unplug the ICP sensor.

If nothing changes when you unplug the ICP sensor, it is bad.

Powerstroke1098 · Apr 27, 2015

I replaced the ICP sensor with an old sensor that I had the same scenario for replacement the CPS, nothing changed, wasn't able to do anything else
This weekend but hopefully soon.

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