Cold temps / 2000rpm low fuel rail pressure limp
-12 this morning, truck #3 started fine and ran well initially - but then RPMs dropped and were limited to 2K and limited upshifts as a result. SES illuminated. Tried cycling ignition after truck/tranny warm, code wouldn't clear. Hmmm...usually the LBZ limp on super cold mornings will clear up after awhile...this one didn't seem like a fuel filter plugging, either.
Fuel filter is nearly new <1000miles, already had a tank of pre-treated fuel, so had to stop by a buddies shop (Sunday 5AM!) for a plowtruck tire fix and he offers to throw the scan tool on it before we summarily waste a new filter. Low Fuel Rail Pressure...reset code...back to normal. We'll see if it repeats at next cold startup. Glad I didn't waste a good fuel filter on this one. Ahhh for the "good old days" :) of the LB7s that ran until they plugged on days like this...no SES...no limp...
Anyone else see this? Our other '06 (#1) plowed and ran fine all morning in the same temps, same fuel, same Delco filter change on the same day...weird.
Also - can you believe the luck of picking up a nail while plowing on the coldest morning of the season? Nothing like a tire swap at 4AM and -12 to wake a guy up...yes I was crabby and the driver told me as much...:cool: