As late as Jan the car was making upwards of 26psi, somehow in the past few weeks something has changed. Its way more than just weather something else is going on and I cant figure out what it is. Car isnt running bad its just only getting 15psi tops.

Anyone have a clue here? I've gone over vac lines and all that, running the exact same tune as I have for the past year or so. I'm stumped, im not getting any codes.

 

try plugging up the bypass valve. i have seen them leak boost before

 

Definitely a slight boost leak somewhere. If you have a boost leak test try that and see if you can feel/hear air leaking anywhere.

Edit: I just saw you have a TVS, idk if a boost leak test works for you.

 

26 psi, are you on a 2.6" pulley or something?

i've seen a boost bypass get damaged before, and if it's old or something, it might be stuck slightly open

 

the boost bypass is not even 6 months old

I was on a 2.8 pulley, and that was in very cold weather, granted being warmer now I expect it to be lower, but not less boost than I made with the 3.5inch pulley

 

seems like alot of psi for a 2.8 anyway... mech. gauge?

 

I have an AEM boost gauge and the stock Map sensors through aeroforce are confirming its low on both

 

even then, i had a 2.9 tvs and only saw 21, maybe 22 max in colder weather...

that's irrelevant though, maybe something else has been over looked. what's your exhaust setup like?

 

bypass vavle getting hung up? did u see if the valve moves freely...

dumb question, but no loss of coolant?

 

well i think i found the culprit, not what I expected given its less than 6 months old, bypass valve is shot

I push it in and it doesnt even spring back like its supposed to, I guess I'm glad its that and not something more expensive

 

26 psi and still can't break 300

 

The car was dynoed 2 years ago at 19psi and made 298 ********.....

 

awwwwwwwwwwww