datalogging my af ratio w/lc1

stroked93 · Post by **stroked93** » Sat Feb 04, 2006 1:20 pm

I have been tuning my mustang however I am fairly new at this. When I run datalog viewer my af does not read just stays flat at 10 to 1. in megatune it displays af realtime properly. when i go into tablgen set it up for innovate the values given are not right, you can edit the values but when you exit they return to 1v=8 4v=20 and i get flat line on log. I did look at the log file and it does not seem to have a column for af either? any help is great. this v2 was installed by DieselGeek I hate bugging him with the mundane as hes a backlog of ms installs to do. Mat

jonfx4com · Post by **jonfx4com** » Sat Feb 04, 2006 3:02 pm

unplug the sensor from the lc1 and power up the lc1 for 30 seconds. then power down and plug in the sensor. power up and the lc1should do a heater calibration followed by a free air calibration. Ensure the car has not been run for some hours so the exhaust actually contains fresh air or crank for 30 secs with ms unplugged to pump some air through.

If it still does not work either the sensor or lc1 has proably failed (like mine!)

Also make sure you have run a calibrate a/f table in megatune.

Maybe we are unlucky or these units are very sensitive?

Jon

stroked93 · Post by **stroked93** » Sat Feb 04, 2006 3:13 pm

the a/f displays properly in megatune. I have done all stated to get that working I seem to have a software issue? Mat

Post by **efahl** » Sat Feb 04, 2006 5:21 pm

Mat,

You need to modify your MT configuration, I don't know what firmware or version you are running, or I could give you details. Find the ini file that contains the [Datalog] section (msns-extra.ini or megasquirt-II.ini or whatever), look down at the bottom. You want to find the variable that is used for the gauge in the [GaugeConfigurations] section, then make a new "entry = " line down in the datalog section that logs that variable.

Eric

stroked93 · Post by **stroked93** » Sat Feb 04, 2006 8:40 pm

You Were right, what do I put in the entry= line? I'm running msns-extra v2 board and chip. thanks Mat

purple people eater · Sun Feb 05, 2006 12:38 am

would it be the LC-1 unit itself or just the bosch sensor?

i have a feeling i just fried mine too, i have cleaned, and calibrated the sensor and the heater etc sveral times, and it reads nothing but 12.3 AFR in free air and in the exhaust

the sensor itself is from a 2002 model Volkswagen Bora, with the AQN V5 (2.3 litre engine)

bosch part number 0 258 007 057

stroked93 · Post by **stroked93** » Sun Feb 05, 2006 7:55 am

My lc1 unit works great, however it is very sensitive to ground offsets. i ended up running a 10 gauge wire up from battery ground to use all of the lc1 ground are hooked to that as well as ms grounds Mat