Chrome on a single o2 car

[HKS3000GT]

Hi all,

I have searched and searched but cant seem to find an answer. I have an Australian spec 3kgt and it only has one o2 sensor located just before the cat. When I log I'm only getting rear fuel trims front is always 0 and if I log front primary o2 it reads constant 0.03904 but rear reads fine and cycles. Are both trims required in my case or can i just get the rear +-5% and leave it at that ? I just want to get my injectors (ID1000s) dialed in so i can go get it tuned.

Cheers.

[Boostaddict]

Try splicing the single 1v o2 signal wire into both primary o2 signal pins on the ecu? Should work I'd think.

[Kx1984]

I thought Greg had something programmed in that if u switched it on or off it only ran off one o2 sensor

[HKS3000GT]

I thought Greg had something programmed in that if u switched it on or off it only ran off one o2 sensor

Yeah i have that selected. I guess jspec ECUs are diffrent in that 1 o2 is used for both front and rear trims maybe?

Im going to try your suggestion Boostaddict.

[mjannusch]

If you set the peripheries to use only one O2 sensor (Primary Rear), then only the Rear O2 sensor and trims are functional. Sounds like it is working correctly.

[Greg E]

Disable bit 2 of periphery 0 to switch to "single O2 sensor" mode.

[Boostaddict]

Will the ecu adjust fuel trims on both banks from the single sensor in this mode?

[Greg E]

Yes456

[GTOJOE]

Is your car jdm or Australian delivered?

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[HKS3000GT]

Australian delivered. I got the idle trim to -1.9 and mid trim to -5. Car now idles a lot better. Had a small problem where cyl 4 was not getting fuel but after swapping the injector to cyl 1 all 6 are working fine now. Hope to have a wideband on it by the end of the week just have to get time off work to get to the exhaust shop as i need a DP made up to replace the stock one.