Thread: 5200-5500 RPM cut out

Hey guys i am new to B15 but ive used the threads to help build my car its a 2004 spec v with custom pieced together turbo kit. i have a problem at 5200-5500 it seems like fuel cut but its not fuel cut cuz its tuned its not the butterfly they open as they should and i have SES light on any suggestions? thanx

may be many things......
How much PSI you runnin,
Do you have stock fuel pump
Whats your plug gap
does it missfire

the more info you provide the simpler it is for us to help.

What code(s) are you throwing? Here's how to pull them sans OBDII code reader: OBD-II Codes List & Clearing Codes

Also, do you have a wideband? What afr's are you hitting up top?

just a high idle code, and i do but no guage its just linked to my FIC and i havent checked but i just got it tuned again and the guy tried everything like adding fuel, taking away fuel, adding timing, removing timing nothing works,

also 9 Psi, walbro 255lph, 600cc injectors, fuel rail, anything else just ask sry like i said im new with this lol

anybody any suggestions??

I'm clueless. Lol

Give us some time man. We will get to the bottom of your issue.

If you could datalog stuff like afr's, timing, etc. it would be a BIG help.

Has it done this ever since the turbo install, or is it a recent issue?

no it has only done this since the new fuel pump, injectors fuel rail, port and polish of the upper and lower intake

Get cipher and post up a log of your pull that'll tell us exactly what's going on

What fuel rail? Are you running a return setup?

obx racing and no just stock returnless system, and what is cipher and what do i do with that?

UpRev - Engine Management

And why upgrade the fuel rail if not going return? The stocker is fine for low boost.

i plan on it just didnt get to it yet

Originally Posted by MisterNuts

UpRev - Engine Management

And why upgrade the fuel rail if not going return? The stocker is fine for low boost.

The stocker is good for high boost too karl, Ive gone to 18 psi no issues (with stock rail returnless setup.

I wanna say he has some sort of leak somewhere (like intake mani)
OR
timing is off?? maybe a bad fuel pump (cuts out @ high load/voltage??)

does the rpm's actually cut out. or will they just not climb any higher?

i had a leak on intake (fixed), brand new fuel pump 255lph walbro..... and the it seems like it hits a rev limiter but its not always at the same rpm anywhere from 5200-5500

videoss

i can do that but i dont kno how to upload them to the thread lol