[Texkenusmc]

Today my truck started to miss at speeds below 70mph. Twice it missed hard enough for the check engine light to blink on then right off. It does only while holding it at a steady speed not during acceleration and deceleration. Any help would be nice. I wish I had a scan tool it might make things easier.

 

[Texkenusmc]

I pulled fuel filter it looked good only 5000mles on it. But there was some trash in the bottom of the bowl

 

[Maryland dieselnick]

How's the oil level?

Did you flush out bowl and get it spotless?

 

[Texkenusmc]

Oil is spot on put in a new filter and flushed bowel clean no change

 

[Texkenusmc]

Tonight I will drop tank and clean filters on sending unit, change air filter and replace throttle position sensor hopefuly that will fix the issue

 

[ArcticDriver]

Tonight I will drop tank and clean filters on sending unit, change air filter and replace throttle position sensor hopefuly that will fix the issue

Question for you guys but if it was clogged pick-up screens in the tank then wouldn't it stumble more with higher accleration instead of at lower?

 

[Maryland dieselnick]

Clogged filters cause a fade out in power.
Stumbling is usually hydraulics.

Do you have a scanner?

 

[Texkenusmc]

Stumbeled at steady speed not during acceleration

 

[Texkenusmc]

Throttle position sensor will be the last thing I do it is almost $600 just because I have the adjustable pedals

 

[Maryland dieselnick]

Do you have access to a Powerstroke capable scanner?


Have you disconnected the ICP sensor to see if there is oil in the socket?

 

[Texkenusmc]

No scan tool and ICP looked good

 

[Texkenusmc]

I will order a scan tool this week just trying to find the right one

 

[Googs]

this one seems to work good with PSD. AutoEnginuity Total Ford Scan Tool Package Enhanced Bundle SP03

 

[Texkenusmc]

Ok that will be what I get

 

[Texkenusmc]

I hope I get it fixed by sat. I need to go scout and set up for a hunt I am setting up for a SF buddy who got a purple hart last tour.

 

[Googs]

Soon as you have some codes get back to us and we will go from there.
Come back with the readings for ICP / IPR duty cycle.
Is the ICP the original one?

 

[Maryland dieselnick]

AE has been updated so make sure you are buying the latest version of AE Giotto.

 

[Maryland dieselnick]

I have a feeling you will find injector stiction. The injectors bind up on the hydraulic side until stronger pressure frees it up. This can be seen by taking the covers off and observing the injectors. No oil will be coming from the discharge spouts until a certain rpm or hydraulic pressure is achieved, then the oil will start pumping and that cylinder will start hitting again.
HoT Shot can bring them back if not too far gone.
This will be on a scanner; a good buzz test but bad cylinder contribution tests.

 

[lance_kohler]

Mine does the same thing in cold weather, found out winter oil is 10w-30 NOT the typical 15-40 deisel oil. Freezing conditions need thinner oil, if thats not it try your idle validation switch.