Stumble of idle....
 

Having an interesting issue with my truck. Trying to load the engine under approx. 1K rpm, it starts to shudder, pedal goes dead, or at least no affect on the engine, real rough idle which drops to about 5-600rpm. Itll catch itself and jump up to a return idle. If I baby it and keep the rpms > 1K not to much an issue. Just for increased clutch wear.


Doing some research, I unlugged the fca, Had bad fuel knock. However it didn't do it Only tried it three times. Does this make sense? Still might not be the FCA. Any way to troubleshoot it? I hate just throwing parts at it.

Heres a vid:

http://vid12.photobucket.com/albums/a207/CrazyMoparGirl/IMG_4173_zpsv87d1i41.mp4

No one?
In the vid I was letting the clutch out. To get it to stumble. Doesnt do it all the time. It will also do it sitting idling. Every couple mins.

I unplugged the fca. Bad knock at idle tried to get it to stumble 3 different times and no luck. Unplugging the FCA defaults the rail pressure to max ~23Kpsi right? If I couldn't get the problem to repeat then I obviously it's a fuel injection problem. Does just the FCA control rail pressure? I'm thinking maybe a sticky fca. However could the overflow valve be going out and dumping fuel pressure. I don't think (more like hope) it's an injector. Only thing different was I added 2 stroke oil this time.

A month after I bought it, feb 2014, it would start, not always get to idle speed and sometimes stall. Not every time either. Researched back then. Pulls the overflow valve no dirt that I can see. Read about adding 2 stroke to this one as well. I ran 2 stroke in my 01 CTD. After that tank. It never did that again. I slacked and haven't ran 2 stroke till this tank (around 9 months). Was a full tank; 7/8 now.
Well there u have it. 2 stroke oil killed the truck. Lol

having the same issue but in an automatic. what was the fix

PRV feel it really hot?

My 03 had a similar problem. It was the fuel pump regulator. Replaced it and no more problem. Hope it helps.