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

 

Ttttttttttttttttt

 

I had the same problem with my 2000 silverado it would do the same thing i tried everything and had no check engine light ended up taken to a dealership mechanic he said it was a knock sensor changed both of them and then it was fine

 

Fuel pressure seems to low to me...I have a single and it idles arounf 60-62 and at WOT goes to around 58...so IMO your fuel pressure is way to low.

 

+1 on the fuel pressure being low. Are you returnless or return style?

 

return style

 

thats about what i run now that i'm return style too. can you log it? if its KR it would show up.

 

Do you have a wideband? The stumbling is very often the signs of it being lean.

 

but it dose not stumble during wot just feels slugish ima do that tomarrow scan ir

 

it can still have a lean spot in close loop. the ve table or maf could have a bid spot in the tune. it happened alot in the 4.3l turbo setup i've been working on. that is until we got the tune dial in. now its great. but he is 3bar tuned.