phase 2 subaru upstream/downstream

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   Where have you mounted your lambda sensors on your subaru conversion? Ive got "upstream wideband" and " downstream lambda" plugs on my converted loom ,but doesn't one of the sensor take a reading after the cat to tell the ecu the cats functioning, as well as your air/fuel ration before and after?.... I wont be using a cat so will it throw the eml? 
Where do i put my sensors please?  

Thanks

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Bromy Members Profile Send Private Message Find Members Posts Add to Buddy List Vanorak Joined: 26 Feb 12 Location: Cambridge Status: Offline Points: 1303	Post Options Post Reply Quote Bromy Report Post Thanks(0) Quote Reply Topic: phase 2 subaru upstream/downstream Posted: 07 Nov 16 at 18:51
	Where have you mounted your lambda sensors on your subaru conversion? Ive got "upstream wideband" and " downstream lambda" plugs on my converted loom ,but doesn't one of the sensor take a reading after the cat to tell the ecu the cats functioning, as well as your air/fuel ration before and after?.... I wont be using a cat so will it throw the eml? Where do i put my sensors please? Thanks
	"follow the masses, do the opposite"

Dave Dorson Members Profile Send Private Message Find Members Posts Add to Buddy List Not Quite Newbie Joined: 01 Nov 16 Location: Stamford Status: Offline Points: 11	Post Options Post Reply Quote Dave Dorson Report Post Thanks(0) Quote Reply Posted: 08 Nov 16 at 12:52
	Downstream is post cat. I know you can get "decat resistors" that prevent EML's on some cars, basically they fool the feedback to the ECU in thinking that there's a cat there reducing the horrid stuff content. I don't think the "downstream" ones actually do anything but trigger an EML though, and not enough to cause it to run in limp.

Bromy Members Profile Send Private Message Find Members Posts Add to Buddy List Vanorak Joined: 26 Feb 12 Location: Cambridge Status: Offline Points: 1303	Post Options Post Reply Quote Bromy Report Post Thanks(0) Quote Reply Posted: 08 Nov 16 at 13:26
	Cheers dave, So am i right putting upstream being the wideband one nearer the left/right bank manifold or ln the collector as they merge? I would have thought on the collector but the used manifold i bought had a sensor still attached hanging of the left bank 2" under the head Ive read about the resistors and also came across people using spacers so the probes not fully submerged in the flow. Think ill have a play about
	"follow the masses, do the opposite"

nick1973 Members Profile Send Private Message Find Members Posts Add to Buddy List Yardie click, click, BUY! Joined: 06 Sep 11 Location: doncaster Status: Offline Points: 865	Post Options Post Reply Quote nick1973 Report Post Thanks(0) Quote Reply Posted: 11 Nov 16 at 08:52
	the pre cat one need to be set at a lenght where it would have been on the scooby they are a bit sensitive post cat isnt that bad will still need the extenders if your not running a cat most conversions tend to run rich too.

Bromy Members Profile Send Private Message Find Members Posts Add to Buddy List Vanorak Joined: 26 Feb 12 Location: Cambridge Status: Offline Points: 1303	Post Options Post Reply Quote Bromy Report Post Thanks(0) Quote Reply Posted: 11 Nov 16 at 13:30
	Cheers Nick, Ill Stick it as close to where Subaru intended and play about with the back one.
	"follow the masses, do the opposite"