Installed new HPFPugrade.com Stage 2 HPFP

[jmarch1122]

Just got it in yesterday, haven't had a change to really bang on it, but its been good so far-no fuel cuts! Also put in 142 BAR check valve. After taking a test run I still had an AFR too lean code, which cleared and I don't expect to come back, but for the first time I had two other faults-both having to to with the EVAP sensor. Can anyone shed some light on this?

[jimrobbington]

It sounds like now that you are pulling more fuel, faster, you are probably creating a vacuum inside the tank. Evap hoses get plugged, so that air/pressure can't enter/exit the tank fast enough. Someone just created a diy for the evap canister. You can totally remove the whole canister too. That diy can be found in the b6 tech section. You can also check the n80 valve to see if that is plugged.

JR

[SykoraA4]

it took a few days for my car to really pep up after installing their HPFP Stage 1, but man once it did! my K0R never felt better. sorry I can't help you with the evap codes though..

[CorneliusRox]

can you elaborate on the removing the canister? What are the downside? just slightly less filtration?

[jimrobbington]

can you elaborate on the removing the canister? What are the downside? just slightly less filtration?

I believe the whole evap system is just a government mandated emissions system. It eventually gets plugged up and either causes over-pressurization, or vacuum in the tank. You can remove the entire system. Only negative thing I have heard is you can't over fill your tank, which you shouldn't do anyway, which is what I heard typically causes this.

JR

[AnthonyS]

Actually the evap system came about after there were some engine block explosions. Yes it is government mandated, but suffice it to say crankcase vapors are very bad.

If you take it off, make sure you have a crankcase breather installed.

[AWDTURBO]

Did you remove your intake manifold to put the 142 bar check valve in?