I have installed a pair of Spartan 3 Lite V2 controllers to my V8 in place of my OE (and now obsolete) NGK Titania narrowband sensors. I’m finding the ECU is applying max fuel trim + as the output from the Spartan doesn’t seem to be indicating Lambda 1- the exhaust smells rich and I’m not seeing the output “swing”.
Based on my understanding the Titania works with 0.1V Lean condition (>15.0 AFR), 1.1V rich condition (<14.0 AFR) with Lambda 1 (14.7 AFR) at 0.7V.
The more common Zirconia is 0.2V Lean, 0.8V Rich and Lambda 1 at 0.45V.
All I can see in the manual is a reference to the narrowband switching at 1V, when warming the output is 0.45-0.46V indicating Lambda 1 for a Zirconia sensor.
Is there any way to rescale the narrowband output to emulate the Titania sensor, or can the Wideband output be scaled to suit? Or do I need a different controller/ device??
If I can reprogram either output to suit are there any pointers on doing so? I regularly work with RS-232 and 485 networks so have a partial idea on what’s involved but an idiots guide would be hugely appreciated, assuming I can use the Spartan for my desired application.
To add: In the slightly longer term my intent is to go a newer standalone ECU with 0-5v dual Wideband input, but I’d rather hold fire on doing so for now.