rail pressure drop?

[06dmax]

i have a 2006 LBZ mods are power max stage 2 turbo, ppe stage 5 trans kit, air dog raptor pump, ppe duramaximizer, fuel rail shim, and efi live. My truck at wide open throttle always throws the code for low fuel rail pressure and thats with the air dog turned up but if i just let the truck sit there and idle it'll throw the code for rail pressure to high, its really annoying any one else have this problem? how do i fix it? it also did this before the turbo and efi live.

 

[SgtKilroy]

Sounds like an FPR to me.

 

[06dmax]

i data logged it with efi live if anyone wants to see that too

 

[ripmf666]

i have a 2006 LBZ mods are power max stage 2 turbo, ppe stage 5 trans kit, air dog raptor pump, ppe duramaximizer, fuel rail shim, and efi live. My truck at wide open throttle always throws the code for low fuel rail pressure and thats with the air dog turned up but if i just let the truck sit there and idle it'll throw the code for rail pressure to high, its really annoying any one else have this problem? how do i fix it? it also did this before the turbo and efi live.

Who's tuning do you have and what codes are you getting at this time as in number P0XXX. You really do not need the duramaximizer now since you have Efi Live.

 

[06dmax]

IdahoRob and the two codes are p0088 and p0087

 

[ripmf666]

Have you tried bottle testing the truck ?

 

[06dmax]

no not yet i havent

 

[x MadMAX DIESEL]

If I was to guess you turned up your airdog trying to help hold rail pressure. And that is causing p0088 at idle. Unless you haven't adjusted the airdog. Welcome to LBZ life :roflmao:

 

[Mike_S]

I would first try ditching the duramaximizer, and see what that gets you. There really is no need for it as EFI Live has more control than it does over rail pressure. It could be that the combination of changes in rail pressure in the EFI tune plus the duramaximizer is throwing the rail pressure out of whack. Worth a try i think.

 

[06dmax]

it did it before the maximizer and does it while thats turned down to and did it before efilive