How do Lee,
Thank you for your instructions.
I carried out these tests, but could not find a kg/h labelled block so used mg/s
The other thing was that in the idle test, blipping the throttle only changed the EGR duty cycle while the revs were dropping then all readings including duty cycle returned to what they were before the blip. I will try again now I have a better understading of the process though.
In the first excel document, I can where the EGR duty cycle changes over: (last column)
Code:
375.21 777 5.2 475.7 86.4 374.87 777 1 0 01 86.4 375.04 777 246.8 493.5 20.9
375.68 777 5.2 475.7 86.4 375.37 777 1 0 01 86.4 375.52 777 246.8 517 94.6
In the second file, I can see where EGR became disabled on row 120 which matches the freeze frame data of the error in the attached LOG file.
It seems as though the vacuum solenoid is very lazy. I cannot find a receipt for it, only the ebay sale of my old one (so I must have bought one). I can't remember if it was a chinese one or a used one or what, but I will take it off and see what the readings/manufacture is.
I put my vacuum pump either side of it with a T piece to use the pressure reading guage (not to pump). I found 850Hg/mm on the vacuum side and only ~150Hb/mm on the side that controls the EGR. While it does vary when doing the Basic Settings EGR ON/OFF test in Group 003, it is more of a half-hearted blip and return to 150. I will order a new Pierberg one.
I also think it has got worse, as when I used to do this test >1 year ago , there was a change in engine running/vibration between EGR ON/OFF, but only a tiny change in engine note.
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