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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
You might try lifting you throttle but keep it open a bit and see if you still get the overrun.

If you do not see an improvement the TBV will not help much.

There are several things that contribute to this. One is a non stock muffler that allows you to hear it more. The main issue is CIS dose not cut fuel off on throttle lift. Part of this is that with throttle lift, control pressure can not be established quick enough and the metering assembly dose not close down as fast as it should so excess fuel is set in. Adding a diaphragm dampener might help some. Last is ignition timing can have impact. Disabling the Vac-Retard function may or may not make a small improvement.

I am a big fan of TBV's so all I am trying to say is it might not cure your issue totally.
Old 04-08-2010, 06:57 AM
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