I am having a major problem. My fuel pressure is 40 psi at idle but when i get on it the psi only rises to 55-60 psi under boost and the motor runs extremly lean. I Have a brand new fuel filter and pump. Heres my setup.

D16a6 with darton flange sleeves
scat rods
JE pistons 8.3-1 compression
ported and polished ports and chambers
swirl polish valves
isky springs
crane cam Duration intake:232 Exhaust: 234
Jrsc with boost upgrade 10-11 psi
Short ram intake
AEM fuel rail
stosk injectors
Airmass header
2.5" exhaust with apexi N1
Intank walbro pump
Fuel psi gauge coming off of rail

 

Are you using a FMU?

 

yea the jackson racing external one ive heard its **** though


Modified by kaedingracer3 at 11:12 PM 9/21/2004