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Valve linking INtake manifold to dump pipe?


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okay looking at the intake manifold on My l20et, at the back. there is a large vavle. that when you take it off it links the Intake manifold and my dump pipe together. :S. its controlled but a VCm.... or something arather: /

 

can someone please tell me what it is for ?. cheer :D

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I thought the only reason to convert to a cable linkage would be to accomodate a different throttle body that didn't work with the stock linkage. Given a choice, I'd go with the mechanical linkage any day.

 

Does that engine have a BCDD (Boost Controlled Deceleration Device)? You'll have to look in a service manual to find out probably. RPM hanging is a very common symptom of a malfunctioning/misadjusted BCDD.

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