PeachParts Mercedes-Benz Forum - View Single Post

duxthe1 · #4 02-19-2020, 08:19 PM

Thanks. Fully tunable is the goal but she isn't giving it up easy. As far as using an eeprom, I honestly hadn't even considered it. If I wear out /break the current batch of chips I may look into it.

I've managed the drive the coupe twice since the last post. Got a new pair of fuel pumps installed because they were starting to get rather noisey on warm days. I also got a Wideband D2 gauge installed. I used the stock location and am using the narrowband simulated output in place of the original narrowband sensor. Initial results aren't very encouraging. It reads about 1 to 1.5 points AFR richer at idle and low load than the actual AFR. This skews the simulated narrowband output making the CIS pull as much fuel as it can, to the point that idle quality gets pretty poor. At WOT and high load it does read in the expected range. This is pretty screwy behavior and I have a couple of possible ideas. Sensor calibration, cheapo controller, or problem with the OE location. Assuming a calibration doesn't improve it, I'll just end up welding in another bung and putting the OE narrowband back in. The wideband reads ok at WOT and that's what I'm actually trying to tune.