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Is there a way to test if the BBM is working? 

 

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 Post subject: Is there a way to test if the BBM is working?
Posted: Mon Sep 11, 2006 9:34 am 
Getting Side Ways
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I undid the top half of my BBM a while ago so that I was able to tighten the bottom bolt on my GRA throttle body. Anyways, I was thinking about it to day and I remmeeeber seeing all the butterflies sitting up, so that air could pass through. But shouldn't they be closed until 3,000 rpm or round abouts?

 

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Posted: Mon Sep 11, 2006 10:43 am 
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Have a read of http://www.fordmods.com/forums/viewtopic.php?t=23928 , a bit long winded but some answers are there. The butterflies should close on startup, and open >3800RPM, so what you saw is normal.

 

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Posted: Mon Sep 11, 2006 8:41 pm 
Fordmods Junkie
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the arm should be pointing down while idling, then at 3800rpm it should move up.

 

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