Rough Idle -- Cutts Off 02 7.3 - Diesel Forum

zusmar · 09-23-2008, 08:27 PM

2002 7.3 PSD NEED SOME HELP ----- BEEN running 2tank wvo / few gallons of motor oil -for a while -- but now I've run into some problems --truck runs better on veg than diesel-- while on diesel it idles up and down sometimes it turns off -- I have to keep one foot on the brake & one on the accerlerator for it not to turn off-- Diablo -- reads PO602-PO605-P1211-P1690 these codes are normal for tuned motor
- THAN PO603 KAM--KEEP ALIVE MEMORY-- CAN ANYBODY GIVE ME ANY IDEAS

rockets10510 · 09-23-2008, 08:30 PM

how many miles on the truck.

dont know what the codes are but could it be the pump?

just an idea.

anthony

zusmar · 09-24-2008, 02:30 PM

the truck has over 210k but i changed the pump back in Jan 08 --I got it from ebay may be it's bad ---- the funny thing is if I purge the system by swiching the selanoid on ---it idles up & smooths out

**klhansen** · 11-04-2008, 05:19 PM

The P1211 means that the HP oil pressure is uncontrolled. It can be because of a tuner demanding more oil than the HPOP can keep up with, or it can be because of a sticky IPR, which would also cause the wild idle. Could also be a bac ICP sensor.