c4s3ys

iTrader: (1)

First off i'm on a fresh built motor. I'm getting around 40psi of fuel pressure on the FPR. Running FIC 1200cc injectors 91 pump gas.

As soon as I start to hit boost car leans out. It sounds like a subaru so obviously its misfiring. So i researched last night and came across the cam angle sensor may be going bad or the disruptor thingy inside could be 180 degrees off and that could cause my problems. So today i put the motor at TDC checked the disruptor and sure enough it was 180 off so i fixed that and then started the car. let it idle for about 5min then went for a drive...

But same thing happens. As soon as I start to hit boost the car leans out. it doesnt sound like a subaru anymore it idles 10x better but im completely lost. What could be causing this?

Raceghost

iTrader: (4)

Parts list please

All Mods.

Need more info.

c4s3ys

iTrader: (1)

10:5.1 compression
Gsc s2 cams
Speed density.
-8an feed -6an return.
255 main pump 450 hobbs switch at 14psi
6266
75mm boomba throttle body
Ams f1 intake.

RightSaid fred

Another fuel pressure problem.

You haven't said under what conditions you've got 40 PSI.

c4s3ys

iTrader: (1)

When 1 pump Is on. Activating it from evoscan. Or idling. I can jump the hobbs switch and activate the 2nd pump and I get around 42psi

RightSaid fred

It's supposed to be 33PSI idling.

Not 40.
Not 42.

c4s3ys

iTrader: (1)

Ok so how do I fix going lean as soon as I hit boost?

kikiturbo

your intake manifold pressure line is probably not connected to the FPR

LetsGetThisDone

iTrader: (1)

This, or tune.

stvn87903

iTrader: (8)

What FPR? I had a defective Fuelab FPR that would cause the car to go lean unless I slowly rolled on to the throttle. Swapped it for an OEM and I no longer have issues.
You may not be able to do this because of your pumps though - I am running (2) 255's, the 450 is probably way too much pump for an OEM FPR.

c4s3ys

iTrader: (1)

the FPR vacuum line is connected to the intake. One of the first things i checked. i also wired the double pumpers to run all the time and same thing. Ill hit up my tuner.

4b11slayer

Map sensor

hutch959

iTrader: (18)

Tune!!

c4s3ys

iTrader: (1)

I have an extra map sensor I'll swap that out and see if my tuner has time tomorrow to remote desktop tune. I live in a area that doesn't have tuners. He lives in another state. I'll post the outcome. Thank you guys.

jonathanheierle

did you change elevation?