Evo 8 missing sounds like a Subaru. Need help!!

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Jan 12, 2015 | 03:35 PM

#16

4bangn

Evolving Member

Joined: Aug 2007

Posts: 450

Likes: 0

From: New York

Quote:

Originally Posted by kaj

If the car was dying while coming to a stop but then return to normal I would say it could be the diverter valve. Since you have larger injectors, it really sounds like your BISS is out of adjustment. Mine used to do the same. The setting should be addressed any time you change injectors. Your tuner should have done this, but not all take the time.
And yes I just mean a recirculating valve is okay but one that vents to atmosphere makes MAF cars run poorly.

diverter valve: where is that and what is a BISS???

Jan 12, 2015 | 05:01 PM

#17

kaj

EvoM Community Team Leader

iTrader: (60)

Joined: Mar 2006

Posts: 13,634

Likes: 824

From: Fresno, CA

Quote:

Originally Posted by andrewzaragoza

If it is 12.8 at idle or normal driving you probably have a boost leak as well.

Actually idle and cruise are vacuum and run closed loop from the O2 sensor. The ECU would compensate. Fuel trims would be way off, though. Under boost, in open loop, it would run rich, though.

Last edited by kaj; Jan 12, 2015 at 05:24 PM.