High Idle - ZR-1 Net Registry Forums

QB93Z · 10-26-2012

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

XfireZ51 · 10-26-2012

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

10-26-2012	#1
QB93Z Join Date: May 2007 Location: Westminster, Maryland Posts: 3,684	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

10-26-2012	#2
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: High Idle Since you ported TB, have you done the Min Air adjustment?