1G MTX-L Wideband and ECMLink Issues (No Closed Loop)

[akamiller]

Hi All, I tinker with this car once very 2 months or so and have recently fixed all vacuum leaks and basic maintenance and was ready to begin basic tuning. One of the first steps is to take a log while in closed loop. I noticed my car was staying in Open Loop at idle. More I read I found that if the o2 sensor isn't cycling, that would cause this. I just put in the new o2 sensor after calibrating in clean air per Innovate's MTX-L instructions. Calibration completed successfully. I began configuring ECMLink for Narrowband simulation. Now value in ECMLink for FrontO2 never changes from .80v and my LC1WB value is way off from what is displaying on my MTX-L display (~10:1 vs ~14.7:1) and still staying stuck in Open Loop. When I turn off the narrowband simulation, the FrontO2 value seems to go back to cycling correctly and the car goes back into Closed Loop at idle.

Any ideas here would be greatly appreciated on where to start. Thanks in advance!!

 

[Vegas Smith]

First, get your throttle reading zero instead of 1 and get your idle switch setup 9should get corrected when you get throttle to zero). Also, you may not have setup your narrowband wire correctly when installing your wideband as your front o2 should be cycling on narrowband simulation.

 

[akamiller]

So I got the throttle reading 0 to 100% now. Not sure what the issue there was. I used the TPS adjust feature, it gave me two values. Then noticed that it was always reading 1% when logging so I did a second TPS adjust and this time it is reading correctly. I enabled Idle Switch Simulation as I know my idle switch is not working. The next thing I noticed was that my ISCPosition was at 120 with my RPMs around 920/930. Once the car got warm, the ISCPosition slowly counted down to 0 and just stayed at 0 no matter what I did with the BISS. Any ideas there?

I haven't gotten to the wiring yet for the MTX-L, but I did notice when I started the car up the signal was .2v until the o2 heated up and then it went to .8v and just stayed at .8v.

 

[akamiller]

Ok, this is resolved... Forgot I hooked up my MTX-L before getting ECMLink so I hooked up the brown wire instead of the yellow wire. Now I have the yellow wire connected and narrowband simulation enabled.

 

[Vegas Smith]

Told ya!

 

[akamiller]

Thanks Vegas!! I now have another issue though. See the following...

http://www.dsmtuners.com/threads/surge-not-idle-surge-when-applying-gas-see-log.516762/