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

[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

[Frenchy]

who tuned it?

[most-hated]

who tuned it?

dan(rgv sierra)

[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

[AKlowriderZ71]

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

Don't check fuel pressure at WOT in PARK. You're gonna be on the rev limiter. Check your fuel pressure while driving, at WOT, and make sure it stays up around 65 or so all the way to 6000 rpm.

And +1 for everything Allen said.

[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