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Boost problem


The_Big_Weave
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Galant VR-4 org Post #: 897040 posted 05/07/10 07:59 PM     Remind Me!  Send Private Message   Edit Post      
Fixed my wastegate. now when i go WOT it takes a very long time to hit 10 pounds. 4k at 10pounds on a 14b is not right. and when it hits boost if feels slower then it was before it hit boost. Any idea what this might be? before it would sputter at around 15 pounds and pull right thro after that and had lots of power.



554/1k SOLD
Non-galant owner.
01 S2K

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CarRacer
Giant Sack of Ginger
83/2000


Galant VR-4 org Post #: 897042 posted 05/07/10 08:09 PM     Remind Me!  Send Private Message   Edit Post      
Boost leak test would be a good move.



James
83/2000

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Barnes
Firechicken
908/1000
237/2000


Galant VR-4 org Post #: 897043 posted 05/07/10 08:13 PM     Remind Me!  Send Private Message   Edit Post      
A) Double check that the wastegate arm is attached to the wastegate actuator.

B) Make sure your wastegate isn't doing what is pictured here. The red dimension marks where the bushing that the wastegate arm passes through started to come out of its hole. That offset should not be there. I had SUPER lag when this turbo was on the car. Notice that even though the wastegate is closed, there is still a large gap between the flapper and the wastegate hole.

http://img263.imageshack.us/img263/3998/failgateillustrated.jpg



-Jon Barnes
#580/2000 (Long Gone)
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geno
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Galant VR-4 org Post #: 897082 posted 05/07/10 10:27 PM     Remind Me!  Send Private Message   Edit Post      
check: vacuum lines and boost leak. i am betting on a vacuum leak issue.


Edited by geno (05/07/10 10:28 PM)

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The_Big_Weave
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Galant VR-4 org Post #: 897086 posted 05/07/10 10:45 PM     Remind Me!  Send Private Message   Edit Post      
Fixed the wastegate had the problem ^ up there, still have no power and have alot of lag.



554/1k SOLD
Non-galant owner.
01 S2K

Posts: 390 | From: Rapid City, SD | Member Since: 02/27/09 | IP: (209.159.237.160) | Report this post to a Moderator

The_Big_Weave
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Galant VR-4 org Post #: 897095 posted 05/07/10 11:05 PM     Remind Me!  Send Private Message   Edit Post      
I forgot to say it works fine with power 1/4 to 3/4 throttle. but WOT it has no power.



554/1k SOLD
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solidviper89
Patty Purex
0425/2000


Galant VR-4 org Post #: 897097 posted 05/07/10 11:13 PM     Remind Me!  Send Private Message   Edit Post      
At that throttle does it make full boost? or does it also lag?



Motivational Poster poster.

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The_Big_Weave
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Galant VR-4 org Post #: 897109 posted 05/07/10 11:39 PM     Remind Me!  Send Private Message   Edit Post      
Lags no matter what I do.



554/1k SOLD
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01 S2K

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TurboTrader
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Galant VR-4 org Post #: 897142 posted 05/08/10 03:01 AM     Remind Me!  Send Private Message   Edit Post   
Pre-turbo exhaust leak? Cracked manifolds are very common. I have one myself, and I don't hit a full 10psi until around 4k, but it does pull hard to redline which leads me to believe you may have a combination of issues. The first could be a leak, the second could be the knock sensor going erratic. Once timing is pulled, you will feel a good loss of power. It is either real knock, or a faulty knock sensor. I would assume the latter. The black goo has a tendency to leak at the rear of the knock sensor and will make it become ultra sensitive and pull timing for no apparent reason. With the advice above, that should narrow it down pretty well.

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