more power at 2/3 throttle?

05duramonster · 02-03-2008, 09:23 PM

My truck seems like it pulls more(makes more power) when i dont have my foot all they way on the floor. anyone else experience this? i might just be crazy but my butt-o-meter is telling me this. Maybe fuel pressure down alittle? do i need a shim kit? any help would be great! check out the sig for mods> thanks

custom8726 · 02-03-2008, 09:47 PM

I have the same problem with mine on LVL 6 of my ppe it seems like it is pulling harder at 2/3 throttle then W.O.T. I am ordering my lift pumps and shim kit this week to hopefully correct this problem.

05duramonster · 02-04-2008, 06:39 AM

i just have mine on performance though. it only 90 hp i didnt think i would need any of that for 90hp. so i need a shim kit to start?

**BigRedChevy** · 02-04-2008, 07:06 AM

it will probably help to change you fuel filter first and see if that fixes it. Then you could always do the shim kit if needed.

**TYREBOYZ_DEMAXIN** · 02-04-2008, 09:09 AM

my LBZ feels the same way but it is still faster when i flatten the pedal versus 2/3rds throttle.

05duramonster · 02-04-2008, 10:35 AM

already did a filter 1000 miles ago when i bought the truck. I just seems like theres no enough fuel. my truck only smokes when you punch it from a stop and then quickly goes away??

**BigRedChevy** · 02-04-2008, 02:29 PM

It smokes when you first punch it because there is no boost, once your turbo spools you are able to burn the extra fuel so the smoke goes away.

Jay Carnes · 02-04-2008, 06:29 PM

I notice the same thing, but I thought it was just me. I too have a LLY w/ a Bully Dog Power Pup. I did a fuel filter & it got better, but not perfect. I have a stock airbox & stock exhaust so I hope it gets better when I can throw some more air at it and let it breath as well.

Let me know if you find a solution!

duramaxiskilinit · 02-04-2008, 07:08 PM

I have that same thing happen to me. Jay Carnes I just took my CAI off and replaced it with my stock airbox and it didn't change anything. what's a shim kit?

**BigRedChevy** · 02-04-2008, 07:14 PM

It is a kit that you put in you fuel pressure relief valve to keep fuel from returning to your tank as easily. It helps keep you rail pressure up when you are running a hot tune.