Year of Manufacture *: 2003
Engine Size and Code *: 200hdi rhy
( Optional ) ECU Type: bosch
( Optional ) Scanner Used: spi
Car came in 6 wks ago with above code, used mytivac on EGR valve& sure enough diaphragm split, replaced valve erased code, came back yesterday, same code, checked all lines, on live data during road test EGR solenoid duty cycle fluctuates from 5 to 99%, however never seems to create any decent vacuum at EGR valve under any conditions! I have even used a gauge that measures mm vac & nothing worth mentioning happens, I am aware the solenoids are trouble & have replaced number 1 solenoid, but after comparing valves & swapping number 2 with number1 no diff, ps vac from pump is good, throttle valve is good, also after road test the solenoid duty cycle appears to stay at 99% for a long time at idle & the unit gets red hot to touch, however more concerned about lack of vac at EGR!any ideas on actual values, surely if its at 99% should have full vac?
PS: sorry for long post
Keith
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