Y-Pipe: Charge Control Actuator
Thread Starter
Grumpy Lurker
Joined: Feb 2001
Posts: 462
Likes: 0
From: LA
I have been experiencing unusual symptoms that I think directed towards this bad actuator for awhile but I never looked into it. Main reason why it's out of the car now is because i'm replacing it with the efini y-pipe.
As far as symptoms, anytime I take my car into high load, high rpm, i.e. WOT and resume normal acceleration, the car would lag feeling as if it i was in non-seq mode at low rpm. But after a second or two it would go back to normal. My car is stock sequential turbos.
But now seeing the sticking valve it makes sense. From my understanding the charge control actuator prevents secondary boost from building because the door is shut allowing only boost from primary turbo. Since my door is sticking it slowly opens, which explains the strange power curve at high rpm on my DYNO. And once the system is in twin-turbo mode, the valve sticks open, which results in what feels like non-seq at low rpm.
I don't know if I made that sound clear at all.
As far as symptoms, anytime I take my car into high load, high rpm, i.e. WOT and resume normal acceleration, the car would lag feeling as if it i was in non-seq mode at low rpm. But after a second or two it would go back to normal. My car is stock sequential turbos.
But now seeing the sticking valve it makes sense. From my understanding the charge control actuator prevents secondary boost from building because the door is shut allowing only boost from primary turbo. Since my door is sticking it slowly opens, which explains the strange power curve at high rpm on my DYNO. And once the system is in twin-turbo mode, the valve sticks open, which results in what feels like non-seq at low rpm.
I don't know if I made that sound clear at all.
Full Member
Joined: May 2002
Posts: 55
Likes: 0
From: MA
FD3Boost, I hope you don't ind, but I pm'd you with a question relating to this thread. I suppose I just could have asked here though. I'm looking for part numbers for the 2 Actuators on the turbo (Charge Control & turbo control) as well as the one referenced above. I'm having some boost issues & am planning on replacing all of them.
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I have the stock y-pipe with actuator as well as the big turbo control actuator from my 95 with 39,000 miles use if anyone is interested.
Heath
morganf1@aol.com
Heath
morganf1@aol.com
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