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Old 10-29-2009, 02:30 PM   #1
soob noob
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Member#: 220158
Join Date: Aug 2009
Chapter/Region: RMIC
Location: santaquin/orem
Vehicle:
02 bugeye
medamullet tuned

Default boost question..

alright so my car was stuttering when it got over boost but i changed the plugs and and now the car drives fine until i hit 15psi then it fluctuates between 11-15psi. when i give it gas it hits 15 drops to 11 then the rpms raise and the boost goes back up it doesnt stay at a constant 15 psi. would this be caused by a boost leak?

any help is much appreciated thanks.
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Old 10-29-2009, 02:37 PM   #2
06HAWKMAN
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Join Date: Dec 2007
Chapter/Region: RMIC
Location: salt lake city utah
Vehicle:
2006 wrx ewg vf39'd
obp

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what mods? BOV?
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Old 10-29-2009, 02:43 PM   #3
soob noob
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medamullet tuned

Default

sorry. i have a 3" TBE agency power BOV its a recirculating one and i had paul (jokerDMX) put a stage 2 map on.
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Old 10-29-2009, 03:16 PM   #4
06HAWKMAN
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Chapter/Region: RMIC
Location: salt lake city utah
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obp

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any way to datalog? may be some strange wastegate setting??????
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Old 10-29-2009, 03:22 PM   #5
Mush04
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2007 Limited STi
Swp

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I have been having an issue similar to this lately as well, some of the things some smart people told me was to take out the hose from the ebcs that goes to the actuator(wastegate), see if you can run normal boost on just WG spring preasure. that would mean it your ebcs is bad, in which case I have an extra cause of my issue.

but yeah check for leaks on any of those black hoses, check to make sure the pill is in there and someone from RSD told me if you take it out and clean it that could help too. I'm sure there are a couple other things you could check too but I can't remember them all right now.

make sure to check your connection's to like the IC from the BOV and any other hoses too.

it could also be the map..... hope you get it figured out I have been tryin to deal with this still for awhile too. it started working good for a little bit but then it went back to fluctuating again too.
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Old 10-29-2009, 03:35 PM   #6
Mush04
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hey if you get it figured out though try to see what it was that fixed it so I can try it also and see if it will fix mine too. and also if I figure it out I'll let you know too. haha
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Old 10-29-2009, 04:07 PM   #7
soob noob
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medamullet tuned

Default

^^^heck yeah alright.. im sort of a noob and im not 100% positive what hose goes to the boost solenoid. any help thanks yeah i was going to try and get a new gasket for my BOV cause i think that there may be a tiny tiny leak there but ill check it out today.

and yes if i figure this damn thing out ill let you know haha...
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Old 10-29-2009, 04:27 PM   #8
Mush04
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this link should take you to a picture of the little black hoses and the top red circle is the hose that goes from the ebcs to the WG, unplug that one at the ebcs, I can't remember if its the top or bottom, let me know if you can't find it.

http://www.clubwrx.net/forums/attach...c-install2.jpg
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Old 10-29-2009, 04:30 PM   #9
Mush04
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I just went and looked at my car and its a little different than the one in the picture, mine goes into a T and then to the ebcs, but it is the one that is on the side of the ebcs not the bottom.
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Old 10-29-2009, 04:53 PM   #10
soob noob
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medamullet tuned

Default

alright yeah mine has the T fitting too so i will do that and see what happens
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Old 10-29-2009, 05:13 PM   #11
Mush04
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yeah and you will probably be runnin around like 18psi so just make sure not to run it too long like that. haha
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Old 10-29-2009, 05:57 PM   #12
soob noob
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02 bugeye
medamullet tuned

Default

so if i can hit 18 psi the i have a bad bcs? im just makin sure im still new to this whole thing
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Old 10-29-2009, 06:42 PM   #13
Mush04
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Swp

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oh no worries man, but yeah you may not quit hit 18 exactly, that was one of the numbers I pulled in like 2nd or 3rd or something like that, but basically if you run normal boost it COULD be your ebcs, cause technically I ran high boost with mine unplugged and I switched to a newer ebcs but still had the issue for awhile, then turned back to normal and now back to bad again. so it's just a possibility. but it would be a good place to start.
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Old 10-29-2009, 08:41 PM   #14
soob noob
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Member#: 220158
Join Date: Aug 2009
Chapter/Region: RMIC
Location: santaquin/orem
Vehicle:
02 bugeye
medamullet tuned

Default

alright thanks.

so when you hit the peak boost in any gear does your do the flutter thing? where it goes from the high to the low? because its freakin weird man... when i do a pull from 1st then go through all the gears fast it doesnt seem to do it just when im on the free way or something and get on the gas... i dunno haha
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Old 10-30-2009, 12:15 PM   #15
wrxkyle
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try an ecu reset too, my ecu get's screwy with boost after running economy mode, could be the issue
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Old 10-30-2009, 12:35 PM   #16
soob noob
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Member#: 220158
Join Date: Aug 2009
Chapter/Region: RMIC
Location: santaquin/orem
Vehicle:
02 bugeye
medamullet tuned

Default

i had to change my battery yesterday so think i reset my ECU but i could be wrong i can try it again.

its weird tho i got the TBE car ran fine but i could tell it needed a tune. so i had a map flashed and that night the car ran great the next day the car ran like crap so i had a different map flashed but it still did the same thing. could it be something caused by the tune. im just looking for the most recent changes and trying figure out what its doing
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Old 10-30-2009, 01:12 PM   #17
Mush04
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Swp

Default

haha yeah it's been a pain in the ass to try and fix on mine too.

how long was your battery unplugged for? if it wasn't long enough the ecu wouldn't reset. but you would probably be ok, but yeah maybe reset it again just to be sure and leave it unplugged for like 15 mins or so.

and when I was running just off WG spring preassure I had full boost all through my gears I believe, it was pulling strong, it was a blast actually haha, but if it's still fluctuating when you are bypassing the ebcs that could be bad.....haha I'm not possitive what it would mean though, maybe a WG problem...?

do you know if the person that had the car before you did anything to it at all? cause the WG arm could have been twisted and that could cause a problem too, but I have no idea where it is supposed to be stock wise.
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Old 11-01-2009, 03:00 AM   #18
soob noob
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Member#: 220158
Join Date: Aug 2009
Chapter/Region: RMIC
Location: santaquin/orem
Vehicle:
02 bugeye
medamullet tuned

Default

i bought the car with the STi TBE on it and thats it they said everything else was stock and when i looked the car over as far as i could tell it was.

but tonight the CEL came back and the car is stuttering again.. i didnt get the time to try and bypass the bcs but i will try tomorrow..

i havent had the chance to read this new CEL yet but the last one was P0171 and said that it could be a bad MAF, big vac leak, clogged injector or bad fuel pressure.
i switched the MAF and the car drove the same (but i may not have had it in long enough), i had a smoke test done and there was a very small leak around the BOV but my boost gauge is reading like 17ish for vac and i thought that is where its supposed to be.

i was now thinking that it could be a clogged injector or the bad fuel pressure...

ive been reading that it could be a million other things too.. but anymore help and ideas would be awesome
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