Wednesday, October 5, 2011

Leaky Butterfly Valve

Just when i thought that everything is ready for turbocharging, the high idle speed problem suddenly reemerged. Not really that big of a problem but annoying nonetheless. I'm idling at 950 rpm and that's with the idle screw maxed. The search for vacuum leak ended here:
Peek-a-boo!

Clearly the butterfly valve isn't sealing properly. Covering the throttle body inlet confirmed this as the engine died instantly, meaning there was no other vacuum leak source.

What is causing this? Metal-to-metal abrasion? Whatever it is, i'm keeping an eye for a throttle body now. Decided that just replacing the butterfly valve isn't worth the effort as i want to have a functioning IACV as well. Remember that i blocked off my IACV previously?

Temporarily for now, i adjusted the throttle stopper bolt and it helped to reduce the leak a bit.

By the way, here's a shot of the TB adapter just in case.
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1 comment:

  1. UnknownOctober 21, 2011 at 7:05 AM

    :( i lent my friend my throttle body and a small area around the region where the shaft goes across theres a visible gap just where the shaft ends on both ends of it, i know how you feel bro..... i really finally decided to do the megasquirt next year after i source a new charmant :)

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