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XfireZ51 · 12-01-2013

R U saying you did re-install the throttle blades? The stock throttle stop stud uses an Allen wrench for adjusting. As Mike pointed out, GM didn't mean for this to be adjusted, but hey this is 20+ years later and things wear and go out of adjustment. These motors are being modified including the throttle body. The point is to check that all the basic mechanical components are working properly before chasing a vacuum leak. It's A PITA which is why several of us have replaced it w an 8mm hex head bolt. One thing to do is take a .002" feeler gauge and see if it drags w the throttle blades closed. A strip of paper will work also. It's a close approximation of where the blades should be with a stock motor. Make sure the motor is up to operating temps before you check on IAC counts and/ or decide to adjust the Min Air.

12-01-2013	#9
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: TOP END REFINISHING R U saying you did re-install the throttle blades? The stock throttle stop stud uses an Allen wrench for adjusting. As Mike pointed out, GM didn't mean for this to be adjusted, but hey this is 20+ years later and things wear and go out of adjustment. These motors are being modified including the throttle body. The point is to check that all the basic mechanical components are working properly before chasing a vacuum leak. It's A PITA which is why several of us have replaced it w an 8mm hex head bolt. One thing to do is take a .002" feeler gauge and see if it drags w the throttle blades closed. A strip of paper will work also. It's a close approximation of where the blades should be with a stock motor. Make sure the motor is up to operating temps before you check on IAC counts and/ or decide to adjust the Min Air.