Just installed my plx m-300 wideband....

[Mackzero]

I used the 0-1v output for my narrow band input on the ecu. Everything seems to be working like it should. My question is: What a/f ratio are you guys seeing at crusing speeds? Low rpms basically. I am reading around mid 14s, 14.38 or so. Just checking if that is normal.

 

[Ronin17]

I see around 14.4:1 to 14.6:1 when cruising. As long as your fuel trims look good then you should be alright.

 

[Mackzero]

My trims are low, I will do more tuning tonight and lean out the mid a bit. As long as the wideband still reads the same I will be allright correct?

 

[Ronin17]

The ECU is going to do all of the work once you get your fuel trims close to 100%. As long as they are close, you should be fine.

Shouldn't take too long getting them in check, then the fun begins, tuning at WOT. I assume you are using a pocketlogger/s-afc combo correct? How about fuel mods, do you have a AFPR if you have a Walbro 255 or larger?

 

[Mackzero]

Supra pump, full rewire to pump. custom 3/8 SS lines w/ Aeromotive AFPR, and I am using the MAFT to tune with, I haven't adjusted the 2% rpm values yet, that is next.

 

[KPWSerpiente]

Mine is located in the rear o2 sensor bung and reads 14.3-14.5 just like I expect it to.

-T

 

[Ronin17]

Supra pump, full rewire to pump. custom 3/8 SS lines w/ Aeromotive AFPR, and I am using the MAFT to tune with, I haven't adjusted the 2% rpm values yet, that is next.

Nice, just wanted to make sure you had a AFPR so you wouldn't have to deal with FPR overrun while getting your fuel trims in check. You should be good to go after getting your fuel trims sorted out.

 

[kpt4321]

Should hover around 14.7:1. If it's not hovering and you are using the narrowband output, then you probably need to modify the output curve a little bit. You will not be able to tune it out with a piggyback or the ECU.

 

[antero]

Agreed. 14.3 seems low for cruise. Mine runs 14.7-15.3 with stock O2's still in place.