Wideband or narrowband for standalone fuel trims?

Hi,
I've got a standalone and it's running open loop the whole time. Apparently my lambda sensor wasn't giving a stable signal and the thoughts were it's screwed.
Not sure if I should replace it with an OEM narrowband or get an after market wideband kit? I suppose with the wideband I then have the choice to either send the 5v signal to the ECU or, out the back of the controller send the ECU the 1v simulated narrowband signal?

I hear narrowband are better suited to the long term trim stuff though, and of course is what most manufactures fit as standard???

Anyone else using a lambda in a standalone for closed-loop trim?

Cheers

What did the guy who mapped your ECU recommend??

Good point, so I've asked and they've advised wideband straight to the ECU, not to worry about a controller and gauge etc - but, my wiring on the car (standard Renault loom) is for a 4 pin lambda only - and a wideband Bosch 4.9 LSU sensor is 6 pin.
Not sure if I can re-pin a sensor or not? So I've asked the ECU manufacture to advise as I think this now won't be as straight forward a question as "which is the best sensor type to use" 😧

Cheers

What ecu? I run wideband on all of mine, then give it 2.5% of trim, so when the sensor fails (which happens a lot more with a wideband) it doesn't throw the fuelling out enough to cause issues.

It's an SC (Delta 800), been built for p'n'p application by SC themselves so hence using the OEM loom and 4 pin cabling for lambda that's there as standard.

Yep that's why I am running open loop now (ignoring the fact current sensor is also not giving a stable signal anyway) as I don't want issues with trim's if a sensor fails. However it's a bit jerky on very light throttle and tuning on closed-loop should take care of it. Also 21mpg I'm getting around town is pretty poor!!

Hmm not sure how to wire that one in then, may be a case of a patch loom

Yeah possibly, although it turns out SC actually themselves do a Bosch 4.9 wideband with a controller in the wiring, and then it can easily pin to 4 pins out from there. Though they seem to think a narrowband will do the trick anyway so will wait and see!