Throttle Body.....high idle fixed.....mostly

[Josh Colombo]

Well.....I got a throttle body from Al, thanks again Al. It was off of turbo legacy. Don't know the vintage or such, Al you know?

Well it has the black goo or sealant around the throttle plate to help seal things.

BUT.....I found something else.....very interesting. On the 90 legacy the throttle body has an adjustment or air bypass needle valve to let air around the throttle plate.

The new one did not have this. I had no idea that screw even did anything......when looking at it before. After getting the new TB I noticed the difference. Plus the support for the plastic cover hid the screw.

I played with the screw, and adjusted it. I could get the idle down, but when starting up it still revved higher then it should when warm....and just didn't seem right.

So I swapped the TB's, idle is good now.....even without the little adjustment screw. The idle may be a little low. I'm not sure. I need to get an external tachometer and if it is low, I will turn the IAC valve slightly so that it is around 700 rpm.

Only prob with things now........at full throttle and high rpms there is a whistle, which sounds like a vacuum leak. It only does it at high rpms. I can't find the leak. I don't think I put the gasket on improperly. Unless the TB I got is not sealing properly around the throttle plate shaft.

If I can get the idle set/IAC adjusted and this stupid whistle gone........I can stop messin with this and move onto other things.......jeez...

Oh....here's some pics of the new TB and the one that was on there.

Josh

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Josh Colombo
<mailto:Josh@surrealmirage.com> Josh@surrealmirage.com

"Life, an ever-changing melody
of beats and rhythm" - ME
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