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Old 10-26-2012   #1
QB93Z
 
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Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,684
Default Re: High Idle

I agree with Pete. The symptoms you describe sound like a vacuum leak. I have had it happen to me. Did you put o-rings on all 16 injectors at the injector housing. Some year LT5's require an oring that is in the housing.

Try removing the bellows at the throttle body air horn and block the air flow to the throttle with a STIFF board, a binder cover works well. With the air horn blocked, the engine should stall. If the engine doesn't stall, you have a vacuum leak.

Good luck

Jim
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Old 10-26-2012   #2
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,686
Default Re: High Idle

Since you ported TB, have you done the Min Air adjustment?
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