Petrol tank vacuum

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vertex_vr4

Well-Known Member
Joined
Nov 5, 2005
Messages
95
Location
Melbourne
Another question,

While putting petrol in the car I unscrew the cap and often (depending on temp etc) there is a decent vacuum in the tank.

I read in the vr4 manual there was supposed to be some equaliser valve or some (hand wavey) thing to stop that as it hurts fuel pressure.. leans fuel/air mix.... creates knock or something.

Anyone know anything bout this?

Cheers,
John
 
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