AUSJEEPOFFROAD.COM Jeep News Australia and New Zealand - View Single Post - EGR defeat for WG 2.7 CRD
View Single Post
  #14  
Old 25-04-2012
fester's Avatar
fester  fester is offline
No Winching
 
Join Date: Jun 2010
Posts: 3,145
Likes: 83
Liked 301 Times in 244 Posts
Default

Piper is right. The shunt is to trick the ECU into thinking nothing has changed therefore it should not have to learn anything so I'm not sure what it means in your case. The merc boys tested with voltage and oscilloscope to come up with that resistor. It was commented that the value was not super critical but 470 ohm was a good match to change the voltage. So other values may work but not sure if they will make any difference. If you think it can improve you could try testing the voltage change when the EGR is connected and working to come up with a different resistor value if needed. Even though we have a different ECU I suspect the signal voltages will be the same as we use the same EGR actuator and most importantly the same MAF.

Interesting to see your results and if anyone else is showing differing results. Not that it is overly critical given the timing when the EGR normally functions.