P1291

[marshallc]

posting for my friend, 2011 6.7 psd. Spe built motor, spe 468 single turbo kit, h&s motorsports cp3 (fits like ****) elite 30% nozzles.

Truck starts, idles and purrs like it should, then bam. Starts to smoke white and lope, throws a p1291 or a p1292 code and won't move under its own power. Injector 4 was grounding out so it got replaced with a new one from ford, problem stuck around. 2,3, and 7 have all been replaced and the problem sticks around.

Iqa numbers are all programmed and such. Any ideas?

 

[mattmal9]

I'm no mechanic by any means but I found this:

"Some F-Super Duty vehicles equipped with a 6.7L engine built on or before 5/18/2011 may experience diagnostic trouble code (DTC) P1291 and/or P1292 due to an internally shorted fuel injector. This concern may be caused by gelled diesel fuel restricting the fuel injector return hose. There is a new fuel injector return hose available which will reduce the occurrence of shorted injectors due to fuel gelling."

Idk if its cold where you are, but have you looked into the return hose? Maybe its clogged or restricted somehow? Hope this helps somehow.