I got my obdlink and downloaded the apps. How exactly can I log knock?I have been using the obdlink mx bluetooth unit and its obdlink software for years now ... lots of real time data (time density can be 100ms but not all pids respond at that rate)I've been struggling with my ebay knock off scanner to check on timing as it only shows realtime data. Is there any OBD2 adapter and software to make a real datalog?
Wow this is nontrivial. The baseline is the knock sensor (essentially just a piezo microphone)I got my obdlink and downloaded the apps. How exactly can I log knock?
Here you go. From the CLA250 service manual.This is a 14mm thread plug.
The NGK site below gives the torque as 25-30 NM (18-22 foot pounds).
PLUG STUDIO / NGK
Where does the 17 foot pounds come from? (that is what I used as per Picard and it seemed to work fine, but curious)
What is the recommendation on the torque when reinstalling a plug?
NGK gives an alternative method of : 1/2 turn after fingertight when new, and 1/12 (30 degrees) turn on reinstall.
Well after trying to datalog my car lots of times, it started runing on 3 cylinders. I thought it was another busted spark plugs but no. I had a "small" issue with a piston. Luckily cylinder wall had zero damage.No worries ... hope I got it right though
Since you are savvy with the software side perhaps you can look into an extended real time data parser which can “count” a designated (preknock) event occurrence and plot/log them over time ... then notify when counts vs elapsed time hits a threshold ... and gee that will be better than any knock sensor
ECU tune by BrperformanceYou had a ECU Tune or PiggyBack ?
These are the best pictures i could find.Also the damage zone is orthogonal to the thrust plane ... if you have pix of that part of the cylinder wall it will be very telling