Danjul89

Hi!

I have converted my Evo 5 a bit with a wideband from Innovate (MTX-L kit) and the way i hooked it up is that im running the wideband simulator in the ecu stock wideband, no problems at all running this on my Evo 5, so far so good.

Did this conversion on my friends Evo 8 and we stumbled upon some problems, same settings and all and the car isn't idling too well. It runs pretty stock/a bit lean at first up to some temp (afr 15.0-15.5 stable). When the water starts to get some temperature the afrs start to swing, from runnint 15.0 to 15.5 it suddenly jumps down to low 10's and almost dies, but recovering to 15 again.

Lambda settings



Do you guys have any input regarding my situation?

Ive tried logging it with evoscan but cant get why.

Attaching a log file when idling! (look att the wideband input (running rs232 and usb to computer) and the narrowband o2 input in ecu.


Thanks in advance
Daniel

Lion_Sam

Try it:
0.985v - 12.1 AFR
0.1v - 17.1 AFR

Danjul89

Thanks for your answer, we resolved the issue and it was resolved with another rom, dunno why but works like a charm now!

t-nol

Sorry for dragging up an old thread, but it's the closest one i can find similar to the answers i need.
I have an Evo 6, and just about to wire up the Innovate MTX-L too, and from what i can tell i use the Brown and Yellow wires from the guage to splice back to the OEM white and black wires come off the OEM o2 sensor for the simmulated Narrowband signal back to my Ecu... Is that right? and does it matter which the brown and yellow wires connect to? Brown to black or white, and same with the yellow ?
This gets rid of the OEM o2 sensor, yes ?

Lion_Sam

t-nol, if you want use MTX-L output instead of stock OEM, you need to connect Brown wire (it's simulated narrowband signal) to ECU pin which is input for O2 sensor signal (idk which color it is, but probably is black).
Yellow output from gauge is wideband signal and used mainly for logging. I've connected it to ECU too, because TephraMod can use it for some features and logging.

t-nol

Not to disagree, but can anyone confirm this ? I've tried sussing it out, and i came to the conclusion it was the "yellow" wire from the innovate that i need to connect to the ecu.

Yellow - 0v=7.35 AFR and 5v=22.39AFR
Brown - 1.1v=14AFR and 0.1v=15AFR

This is why i thought the yellow wire had the correct simmulated narrow band signal for the Evo.

WytWun

A narrowband sensor only produces between 0 and about 0.9v, with a lambda of 1.00 (AFR of 14.7 for petrol) producing about 0.45V. Sensor output voltages higher than 0.45V represent richer mixtures and voltages lower than that represent leaner mixtures.