Same thing, I threw the P0300 =\

 

The RPW decomp is good to 18psi. The stock headgasket will hold up fine to high levels of boost as long as you have ARP head studs. The RPW gasket is composite and is prone to failure under boost. There are threads on other sites that talk about this.

 

Instead of p0300 during WOT I now get p0304 which is cylinder 4 misfire.

And my car is back to going lean again! It starts off at high 10 AFR and as the boost and RPM rise it tapers to low 12s AFR.

Did anyone else solve the lean issue yet?

 

i did. im now hitting 9-10 psi and my afr is around 11.5. i ended up having to max out the maf scaling at 800,900, and 1000. does your boost rise with the increase in afr? i noticed before that i would hit about 8 psi at 12.5afr, and then when i increased the amount of fuel to under 11afr, my psi dropped to about 6.5. so i think the leaner you get the higher your boost will be (almost like a runaway reaction). i would just try to increase the scaling more at 800-1000 hz.

 

What are your values in the fuel map? All 10.0?

So all you touched where the values in the MAF scaling?
Nothing else?

 

my values go as low as 9.5

that is correct.

 

what kind of boost controller you running... sounds like that could be causing your variations in boost...

 

Hallman MBC, it's consistent with little to none boost creep.

I think my injector on cylinder 4 is going bad.

I'm gonna switch it to another cylinder and see if the misfire will switch.

I need bigger injectors anyways...

 

are you using stock fuel pressure or running a fmu?

 

stock fuel pressure...

anyone know where to get wrx 440cc injectors?

 

i found mine on ebay for around 100 used

 

Check on nasioc forums... Your boost shouldn.t vary like yours does... Might wanna check for a vac leak on the charge side post turbo

 

will 05 WRX injectors fit?

someone is selling them on NASIOC

 

get a pic of them... They are gonna be light blue in color. From the 2002-2005 WRX 2.0L engine

 

they're from an 05 WRX