Upgrade this sensor and get more power

[chrisday1990]

Hello everyone,


After waiting three months for the O2 sensor and owning the car for around 12 months, I’ve finally got it back — and honestly, it feels like a completely different car.


Even before the old sensor actually failed and brought the warning light on, I’d noticed things like lifting off the accelerator could feel quite jerky through the engine. Since having the sensor replaced, the whole car just feels noticeably smoother and better to drive.


I know incorrect emissions readings can potentially affect things like fuelling, engine management and even traction/stability systems, so I’m wondering if the sensor had been giving inaccurate readings for quite a while before it finally registered as a fault.


Very strange, but the difference is genuinely noticeable. Has anyone else had a similar experience with their Emira?

 

[Foosh]

It's totally logical that you'd feel more power with a properly functioning 02 sensor vs. a malfunctioning one. The ECU software wouldn't be functioning per specs with a malfunctioning sensor.

I thought from the title of this thread, you'd be talking about the latest aftermarket trick when you referred to it as an "upgrade." It was actually a repair.

 

[chrisday1990]

I feel cheated hahaha but glad it’s fixed

 

[s2krazykarl]

"Replace this failing sensor and get more power" might have been a more accurate title.

 

[papadop88]

I came here thinking there was some upgrade based on the title of this thread...

 

[Foosh]

I didn't say I believed there was some sort of power upgrade related to an 02 sensor, but I was curious as to what the claim was going to be.

 

[Kimmax]

Imo there won't be a true power gain with wide-open throttle since the ecu will go into open loop anyway, but that might be gross half knowledge on my part haha

 

[OppositeLock]

Are you sure it goes open loop? I thought modern ECU's were almost entirely closed loop these days. Our engine design is old, and the V6 does run super-rich at WOT, so you could be right, it's just surprising.

Euro-7 forces all cars to run at lambda=1, therefore, any new cars will have to be 100% closed loop