Fuel pressure reg or transfer pump? Lbz

[blackmax001]

Hey guys I getting the low rail pres code and was wondering if it woul be my fuel pres regulator or my transfer pump? It runs awlful and surges and is going in limp mode often. I have an 06 lbz with 215k thanks

[JRODS*LB7]

check your injector pump also!

[blackmax001]

I may do that. Ok it was idling in the driveway last night an all a sudden it was like you tapped the pedel and out came a smsll puff of black smoke? And if it's parked for an hour or so I will have to pump the fuel filter primer in order to get it to start? I am gettin a p0088 high fuel rail pressure code and all this time I thought it was a low rail pres code! Does this sound like a fuel regulator? And what would cause it to have to be pump the filter primer to start? It leaks a little fuel around the water sensor draincock "sometimes" not always. Could it be duckin air causing it to run so bad? This thing is weak as water at certain rpms and limps often. Help please thanks

[JRODS*LB7]

So the fuel filter is leaking?any fuel leak would cause it to lose prim maybe the filter head needs to be rebuilt .orings etc...

[blackmax001]

Yeah just a little but not always. What would cause it to have too much rail pressure? Rail pres sensor maybe? Or fpr?

[jwillis71@cfl.rr.com]

Has any one got any tip's on how to Change fuel presure regulator 2001 duramax
Jwillis71