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Old 01-31-2009, 08:37 PM   #1
eagle claw
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Default Tell me why my car is doing this video inside

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Old 01-31-2009, 08:55 PM   #2
eagle claw
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Old 01-31-2009, 09:57 PM   #3
djoye
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Looks like the pill isn't in the boost line connected to the compressor. Without the pill it'll boost around 7psi when it should boost ~13psi.

This picture is in regards to having an aftermarket boost controller but you probably are using stock boost control so you need the pill. Where that arrow is pointing there should be a little pill inside the hose to bleed air through:


I don't know how or where to obtain that pill but you could probably order one from a dealer or online. Search around for the part number.
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Old 01-31-2009, 11:38 PM   #4
eagle claw
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There is a pill in the line, the little lump in the hose correct?
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Old 02-01-2009, 03:36 AM   #5
pyh
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Yes, it is
I had the same problem)
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Old 02-01-2009, 11:32 AM   #6
yarrgh
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just like someone who commented on the video, do you feel the car doing what the gauge is saying? could be a bad gauge.
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Old 02-01-2009, 12:08 PM   #7
WeldingHank
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what are your mods?

edit: read the other post.

for whatever reason the engine seems to be overboosting and the ecu is correcting it. find out why its overboosting.
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Old 02-01-2009, 12:51 PM   #8
BugI_FTW
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My car is doing the same thing. I am running Cobb stg 2, bosal downpipe, sti uppipe, sri, stock bpv. I did a vacuum leak test and everything was tight. Recently, the car will randomly only make ~7 lbs of boost in any gear, but other times it boosts to ~17psi. Do we have any parts in common? I have ~123k miles on the car.
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Old 02-01-2009, 01:24 PM   #9
tabrad
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Thought that stretch of freeway looked familiar. My car used to do the same thing, some mechanics figured it was most likely a problem with the ecu itself, but fixed it easy just by putting a manual boost controller on
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Old 02-01-2009, 01:28 PM   #10
eagle claw
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Yeah I can feel the power coming on and off just as the gauge goes up and down.

BugI, My car is all stock.
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Old 02-01-2009, 01:37 PM   #11
SUBYS R US
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im getting the same problem here, but i dont know what it is
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Old 02-01-2009, 01:38 PM   #12
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i have had the problem and fixed it, there are three causes, 1 if Turbo dynamics, 2 is wastegate duty cycle is to high, 3 is you are hitting the surge line of the turbo, all of which are really bad for the turbo, and can cause major problems if its not corrected, if you have another map try loading that, or messing with yours, i believe there is an article about it on the romraider forums, i dont have time to find the link to it at the moment, i got work. if when i get off tonight yall havent found the problem, i can link to the explanations of each
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Old 02-01-2009, 02:02 PM   #13
eagle claw
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Any info would be great.
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Old 02-01-2009, 02:46 PM   #14
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Hello,

looks like your overboosting and its opening the wastegate to comepensate.

First off fiqure what your max boost under max load should be for your givin mods, i.e. 13.8 psi @ 4500 rpm in say fourth gear, if you are going above the max boost your ecu will tell the boost controller to open and close the wastegate. This happens pretty quickly, the boost will drop then rise again, drop, rise again and so on. Looks like you need to loosen up the wastegate arm a couple of turns so you do not overboost. I had this same issue using cobbs OTS maps stage2 and thats what helped me. When I remapped using open source I had to once again dial my wastegate to compensate overboost, works perfectly and rock steady. Stage 2 tdo4 18 PSI @4000~5500 RPM tapering off to redline. Good luck

Check this link for info>> http://www.xpttuning.com/osecuroms/v...php?f=34&t=325

Last edited by xevets; 02-01-2009 at 02:56 PM.
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Old 02-01-2009, 03:22 PM   #15
scrapin'
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Just looking at the pic, curious...what's going on with your inlet hose? Is there no clamp on that and is the re-circ hose "glued" in...?
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Old 02-01-2009, 03:31 PM   #16
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I have been stg 2 for 2 years now and this problem is now just happening.
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Old 02-01-2009, 04:06 PM   #17
eagle claw
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Quote:
Originally Posted by scrapin' View Post
Just looking at the pic, curious...what's going on with your inlet hose? Is there no clamp on that and is the re-circ hose "glued" in...?
That pic is not of my car?
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Old 02-01-2009, 04:07 PM   #18
eagle claw
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I just adjusted the wastegate 1 full turn and it seems better, as soon as it cools off I'm going to do another half turn.
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Old 02-01-2009, 04:53 PM   #19
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Quote:
Originally Posted by BugI_FTW View Post
I have been stg 2 for 2 years now and this problem is now just happening.
try some injector cleaner
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Old 02-01-2009, 06:22 PM   #20
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Quote:
Originally Posted by eagle claw View Post
I just adjusted the wastegate 1 full turn and it seems better, as soon as it cools off I'm going to do another half turn.
I think most would recommend resetting your ECU after doing this.
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Old 02-02-2009, 12:42 AM   #21
spinx2005
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Had same problem. People telling me i had hoses loose. I check re check and again. bought a 120 turbo inlet, nope not it. bought another pill and the vac. hoses to the turbo, nope not it. I would go to 21psi down to 15 back and forth on my tdo4.

And all along it was the factory boost solinoid. I put a homemade mbc on it and problems went away. you sould look into that. just saying .
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Old 02-02-2009, 12:45 AM   #22
BugI_FTW
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Quote:
Originally Posted by spinx2005 View Post
Had same problem. People telling me i had hoses loose. I check re check and again. bought a 120 turbo inlet, nope not it. bought another pill and the vac. hoses to the turbo, nope not it. I would go to 21psi down to 15 back and forth on my tdo4.

And all along it was the factory boost solinoid. I put a homemade mbc on it and problems went away. you sould look into that. I mean with that many miles it held up as long as it could. just saying .
Thanks for the reply, this is what I originally thought as well and changed this a month ago with no change. If the OP wants to PM me, I have a stock BCS I can send for him to swap to see if it fixes his problem.
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