nightmare

[most-hated]

change my o2's ,change my sparklugs ,checkt my injector wireing ,and still the truck tends to stutter bad at 1/4 throttle, then i step on it WOT and it dosent studder anymore but it feels slow ,i have no idea wats wrong with it, i check my fuel pressure its at 50 idle and wen i put it in drive and give it 1/4 throttle so it can studder it goes to 53, i have dual walbros is that pressure about right ,CAN SOME ONE PLEASE HELP!!!!!! ME OUT IV BEEN TRYING TO MAKE IT WORK ALL DAY AND NOTHING , I DONT EVEN GET A CHECK ENGINE LIGHT OR ANYTHING I THINK IM GONNA BURN MY TRUCK

[GasGuzzler]

Does it have cats?

[most-hated]

nope

[Frenchy]

who tuned it?

[Oldblue5.3]

not to be a threadjacker but i am With This guy^^^. i was fixing to start a new thread but i have exactly the same problem

[brobradh77]

I replied on PT.net also...IMO your fuel pressure is too low..I have a walbro 255 in my truck and it idles around 60-62 and at WOT I am at 58

[most-hated]

i did a wot test and it would jump to 65 but it was in park i got a code finally system too lean bank 2

[most-hated]

who tuned it?

dan(rgv sierra)

[most-hated]

there weared part is that i drive like at 60mph for like 10-15 in a straght rd normal driving and it kinds of gosed away but as soon as i park it and turn it on 10 mins later back to studdering and stuff

[CHEVROLADE]

pump or pumps are going out.