Atmospheric BOV

[DANT123]

Hello, im new here and ive read this a few times but i bought a 97 GSX with an aftermarket atmospheric BOV and a walbro 255 fuel pump and aeromotive FPR. Naturally it runs like junk. it runs really rich so I put new upstream o2 sensor but it still runs really rich and wont idle unless I unplug the MAF. Also sputters and backfires with very slow acceleration under 2.5k rpm and once i get into boost it runs fine. Do I need to get a recirculating BOV to fix this? and where can I buy an OEM one or something that would work. Thanks!

 

[Dstarperformance01]

You are venting to atmosphere after the air has been metered. You need to vent before its metered. So, you need to change maf/air metering setup. Either Gm maf or speed density is the only way to run a vented bov.

 

[DANT123]

You are venting to atmosphere after the air has been metered. You need to vent before its metered. So, you need to change maf/air metering setup. Either Gm maf or speed density is the only way to run a vented bov.

so essentially i need a recirculating BOV?

 

[Spideydsm99]

Bingo!

 

[Dstarperformance01]

Exactly @DANT123