03 wrx bug eye - boost leak ? - Subaru WRX Forum
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#1 Old 04-15-2013, 10:40 PM
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03 wrx bug eye - boost leak ?

Hi everyone.. newbie here, first I'll list the car's mods

FMIC
3" Catback exhasut
Uppie pipe
AEM CAI

I know this been questioned/answered lots of times but I think every case it's different.
I purchased the car a few months ago during winter. I've read 00-03 bug eyes stock boost is around 14 psi but Im only boosting 8-9 psi in every gear but I've noticed (i tried twice) that on 3rd gear at high rpm it will go past 9 and it will reach 14 psi, the 2nd time I tried I got a check engine light got scared reset the ecu and went away. I know i def need a tune since the car came with all these aftermarket parts I only drive the car once a week since I walk to my job... you guys think I have a boost leak, vacuum leak. I even heard about a restrictor pill inside the vacuum lines ...could that be the problem?... !Cry!!Cry!
is there any vacuum line diagram I can download so i check the vacuum lines are installed the right way?



thanks in advance
Jay
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#2 Old 04-16-2013, 05:43 AM
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So you still have the stock downpipe?

Do you have a way to check for boost leaks? ie... boost leak tester, compressor and soapy water in a spray bottle?

Any local meets around your area? This might be your best bet if you can't find any boost leaks

Paul
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#3 Old 04-16-2013, 10:17 AM
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no aftermarket as well pzr2874
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#4 Old 04-16-2013, 11:18 AM
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Do a BLT... easiest to try first.

Paul
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#5 Old 04-16-2013, 02:09 PM
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hitting 14psi only at high rpm on 3rd gear... isnt that a sign of boostcreep??
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#6 Old 04-16-2013, 08:11 PM
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What gears are you only getting 8 psi in? First and second?

Not sure why someone put a FMIC on there. That's actually hurting your car.
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#7 Old 04-17-2013, 05:31 AM
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Quote:
Originally Posted by 03bugeyeDude View Post
hitting 14psi only at high rpm on 3rd gear... isnt that a sign of boostcreep??
You have an aftermarket DP, correct? Unless it's "tuned" for 14psi

Paul
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#8 Old 04-17-2013, 12:59 PM
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Quote:
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What gears are you only getting 8 psi in? First and second?

Not sure why someone put a FMIC on there. That's actually hurting your car.
Im getting low boost in all gears, the only way to get 13-14 psi is when Im on 3rd gear at high rpm and I floor it brfatal...

I dont think the car has to be tune for 14psi since I've read the 02-03 wrxs stock boost is 13-14 psi.... yeah the car came with a FMIC "3 dowwpipe /exhaust catless ....
I even had to fix the vacuum lines once I got the car because the lines were all installed the wrong way.. I wasnt getting any vacuum air flow... Someone even told me the wastegate might be messed up....
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#9 Old 04-17-2013, 01:16 PM
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Do a 3rd gear datalog (if you can)

After a BLT

Paul
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#10 Old 04-18-2013, 03:32 PM
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Do a 3rd gear datalog (if you can)

After a BLT
will do this over the weekend thanx
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#11 Old 04-20-2013, 10:24 PM
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did a boostleak test and found no leaks... i do have the restrictor pill in there... lall vacuum lines are well installed ... i doubt the turbo is bad or who knows maybe its the wastegate .... i was thinking that maybe its the bcs that is bad and just replace it... a friend suggested to install a hallman mbc and just tune the car...
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#12 Old 04-20-2013, 11:20 PM
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could always trade out the stock solenoid to see if it still does it.

Paul
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#13 Old 04-22-2013, 07:14 PM
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could always trade out the stock solenoid to see if it still does it.
is there a aftermarket BCS I can buy to replace the stock one??
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#14 Old 04-23-2013, 05:42 AM
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None that I know of. 3 ports CAN be run in interupt mode. But you will be on your own on that piece.

Paul
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#15 Old 04-23-2013, 12:14 PM
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None that I know of. 3 ports CAN be run in interupt mode. But you will be on your own on that piece.
hey I know I mentioned that I have the restrictor pill in there, I do, but i replaced the T and the vacuum lines; I remember taking the restrictor pill out and put inside another new vacuum line i bought, I wonder if I put it the wrong way or if the vacuum lines have a specific size... do you happen to know the diameter?

this weekend I'm gonna take the whole bumper out and just replace all the couplers and double check the IC pipes... some of those lines have gotten really as hard as a rock (thats what she said) the ones going to the BCS.
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