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Honda B20A Prelude FIV and EACV Operation


Honda B20A Prelude FIV and EACV Operation During Cold



During cold FIV open and EACV also open...
In this video, both FIV and EACV opens.


Honda B20A Prelude FIV and EACV Operation During Hot



During Hot FIV close and EACV will control idle...
In this video, the FIV have some leaking.
It is not supposed to let any air into intake.

FIV operation depends on coolant temperature (mechanically).
while EACV operated by ECU...(electronically)

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