aidandj

iTrader: (5)

No misfire. Drives fine. Needs fuel if pulling through it or cruising in it.

Using that map AFRs are pretty consistent.

18psi

iTrader: (76)

pics blocked at work, so can't pics in #9679, but I've had this happen before. it was a 93 so no vics, no vtcs, and nothing else.

ve map was fine for about a year or two, then all of a sudden developed a lean spot around the same rpm range, but at full boost. throwing fuel at it totally helped/solved it. never did figure out exactly what happened (he had many other issues he's still working through) but my guess would be related to fpr/pulse dampener.

this is a very specific issue on 08+ sti's when the OEM moved to a crappy cheap fpr+pulse dampener all in one, causing a very specific lean spot from resonance in the fuel system. dunno if related, but symptoms sound almost identical

aidandj

iTrader: (5)

This is only at cruise. so 50-90kpa. In boost its totally fine.

18psi

iTrader: (76)

which is exactly what the sti's experience. cruise/part throttle. so much that the OEM ecu has a specific fuel compensation table for it. I dunno, just spitting out ideas

are your fuel pulse dampers still in place?

aidandj

iTrader: (5)

Oh I missed the added bit about the STI. I'll get some logs of it soon with fuel pressure, but its not dropping or anything.

afm

iTrader: (3)

He has an NA return-style system.

aidandj

iTrader: (5)

vlad killing me with the ninja edits.

Yeah return style system.

Savington

iTrader: (31)

Those people are wrong. Leakdown procedure is from the FAA and it's 80psi through an .040" orifice for bore sizes under 5.00".

http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/0/99c827db9baac81b86256b4500596c4e/$FILE/Chapter%2008.pdf Page 8-8

aidandj

iTrader: (5)

I just followed the instructions that came with the leakdown tester. Either way. 1psi out of 90 seems pretty decent.

Savington

iTrader: (31)

All your pics show 2-3psi leak, but that's still perfect. ~2-3% (~3psi out of 90) is considered perfect leakdown.

aidandj

iTrader: (5)

Yes that. Tick marks got associated with %.

Seals arrive tomorrow. Probably will get everything stripped down tonight and ready to install.

Der_Idiot

iTrader: (2)

Man, wish I was closer or I'd swang out to help.

aidandj

iTrader: (5)

I'll pick you up from the airport

Ted75zcar

iTrader: (2)

I had a similar odd VE region, Radium damper seemed to fix it. I didn't see nearly the spike you have there.

i had a resonance in the hardline at idle that sounded like rod knock before the damper as well.

AEM adjustable FPR, DW 200, ID 850 at 3 bar, large fuel rail, single feed dual return through an6, MS2 with incorporate AFR, 40um reusable inline filter, 2um spin on water separator, hinged check valve on feed side

edit: add fuel filter details

aidandj

iTrader: (5)

Interesting. I don't feel like adding more parts to the fuel system. Tuning around it seems to work fine for now.

aidandj

iTrader: (5)

I ain't ****** around this time



Cams are still in the head so i cant get a full inspection. But what I can see they look good. I'll find out in a bit. Its too hot. Anything over 80 blows.

Lexzar

iTrader: (2)

Tell me about it, went to go do some work and it was 101*, wtf California?

Scaxx

Man, I don't know about your weather down in Oregon but I'm ******* sick of constant gray up in Seattle. That **** gets me even more depressed than I usually am. I'm just glad it's finally warm and sunny up here, we've had a rainy *** fall, winter, and spring.

101 on the other hand is getting on the toasty side lol

aidandj

iTrader: (5)

I always feel that way until the sun shows up. Then I curse it. I wish it was snowing again.

Scaxx

Hahaha spoken like a true northwestern