Robert Maraugha
SDD Junior Member
Here's a tough one for the class. Three DTC's (P-0122, 0603 & 1211). The only symptom is "surging". When trying to maintain steady speed, whether it's 15 or 70 mph, the truck engine lurches/surges unless I am advancing the throttle (depressing the accelerator pedal) or...here's the odd one....I have it on Cruise Control. There has been no loss of power. No rough idling or difficulty starting. I also use the SuperChips Max Tuner from time-to-time for this 7.3 ltr. When I have the program for "Performance" installed the "lurching/surging" is accentuated.
Another odd thing is when the engine is cold there are no issues. It's only after it's been driven 5-10 miles then the lurching/surging occurs.
Another odd thing is when the engine is cold there are no issues. It's only after it's been driven 5-10 miles then the lurching/surging occurs.
