PDA

View Full Version : Help please :(



cjep08
10-10-2009, 08:10 PM
well my 2002 wrx is now having a boost problem...

it will boost until mid to upper rpms and then the boost level just drops... sometimes it will drop then comeback and just keep doing that... either way the boost doesnt stay :(

TAILWAG
10-10-2009, 08:23 PM
have you checked the intercooler pipes for leaks?

cjep08
10-10-2009, 09:04 PM
yes... they dont seem to be leaking

redwrxhead
10-10-2009, 09:29 PM
have you checked the intercooler pipes for leaks?

Angel: when did you get the new viper?

and cjep08 sounds like you might have an exhaust leak somewhere.

myveryown07
10-11-2009, 01:57 PM
have you checked the intercooler pipes for leaks?

Angel: when did you get the new viper?

red tunerready made a post about it

WRXNFX
10-11-2009, 04:22 PM
This is sort of a standard boost v RPM curve I made out of an old log.

I take it that the boost is dropping of more and earlier?

http://i202.photobucket.com/albums/aa136/wrxnfxkc/boostvrpm.jpg

cjep08
10-11-2009, 05:37 PM
yes much earlier... and dropping a lot more, like back to 0 boost

scooby_rex
10-11-2009, 06:23 PM
how high does it get to?

make any changes to your engine/turbo lately?

cjep08
10-11-2009, 08:26 PM
on the stock boost guage, about .5 and then immediately drops to 0 doesnt matter if i'm gunning it to that boost or slowly increase to it

and nope no changes

how big of an exhaust leak am i looking at? there is no sound difference in the car

WRXNFX
10-11-2009, 09:32 PM
Can you feel it cutting out too?

cjep08
10-11-2009, 11:33 PM
very much so... got stomped by a 2002 mustang gt :(

TunedAlready02
10-11-2009, 11:48 PM
on the stock boost guage, about .5 and then immediately drops to 0 doesnt matter if i'm gunning it to that boost or slowly increase to it

and nope no changes

how big of an exhaust leak am i looking at? there is no sound difference in the car

i would think that if it "dropped to 0" then it would be going in to vacuum. i would say its a faulty gauge but if youre feeling it performance wise then there is obviously another factor. if an exhaust leak was coming in to play it would be before the turbo but at the same time it would be big enough of a leak that you would hear it. have you checked the lines going to the wastegate actuator? thats the only thing that comes to mind for me at the moment...

cjep08
10-11-2009, 11:52 PM
yeah all the lines seem fine... maybe hard and need replaced but not leaking.

i'm stumped fellas, no one i have asked can figure it out and i definately can't figure it out. might be time to take it to the shop. unless some one wants to take a look and prove me ultimately retarded, which very well could be the case

Justin 05 Sti
10-12-2009, 06:30 AM
Borrow or make a boost leak detector.

scooby_rex
10-12-2009, 10:51 AM
You may want to check the wastegate arm, too, to make sure the spring hasnt popped off.

There's only so many paths that go to the turbo, just take your time and start at each one and follow all the path to see if theres a missing hose or something looks like its missing. I'd check the easy things first, like the bov recirc hose that runs from the intercooler.

WRXNFX
10-12-2009, 11:43 AM
You may want to check the wastegate arm, too, to make sure the spring hasnt popped off.

There's only so many paths that go to the turbo, just take your time and start at each one and follow all the path to see if theres a missing hose or something looks like its missing. I'd check the easy things first, like the bov recirc hose that runs from the intercooler.

This is good advice.

A boost side leak big enough that the system went to 0 boost would be REALLY loud right?

To add to the boost side checks, check the throttle body hose and the Y pipe, slthough I think you would hear that..

cjep08
10-12-2009, 03:13 PM
alright fellas i think i fixed the problem.. replaced a couple of hardened hoses and seems to have fixed the problem... hopefully

thanks everyone again for all of the help!!!

scooby_rex
10-13-2009, 06:35 AM
sweet!

good to hear