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Old 12-03-2013   #340
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,686
Default Re: TOP END REFINISHING

Quote:
Originally Posted by Schrade View Post
Alright; IAC blocked TIGHT (cold motor)...

Idling @ 875, smooth as silk...

Post 3 minutes - loping irregularly 125rpm's, sometimes still very smooth, from 825 - 950, still OL...

Now CL; started about 200 rpm lope IMMEDIATELY when it went CL...

2 minutes CL; settled down with only a 75 rpm lope - 900 - 975...............

3 minutes CL; smoothed out real well - 950 - 975.

5 minutes CL; now holding 975 tight as a drum.
Chuck,

OK doesn't look as there is a vacuum leak however, it sounds like the throttle blades may be too far open or allowing some additional air. I assume the TPS is at ~.55v. Now if you can back off the throttle stop 1/2 turn and see if that makes a difference. Leave the IAC port blocked.
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