Why?

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Sr20detNESS
Posts: 82
Joined: Mon Aug 01, 2005 3:26 am
Car: '92 240sx fastback redtop sr20det

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why does a vented BOV cause your motor to run rich?

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ILikeMy240sx
Posts: 5358
Joined: Fri May 28, 2004 2:49 pm
Car: SR Power

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because air that was metered by the MAF is being let out when the ECU thinks that all that air should be in the engine. So you have less air than there should be in the engine hence rich condition.
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Nismo_Freak
Posts: 10314
Joined: Wed Jul 24, 2002 10:42 pm
Car: 89 Nissan 240SX

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It causes a momentary over rich situation when you lift the throttle.

It does not cause the motor to run rich constantly.
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