solenoid egr
 

hi to all
how does the egr solenoid work
david

Why do you ask are you having trouble with the EGR valve?

Hi to all
t4 says there is a egr fault and i have taken the solenoid off and you can blow through it and if i am correct the solenoid should open when the ecu sends a signal but i tested mine and it is open all the time so i think this is the fault i put a continuity tester between the two pins and there is a circit there i but 12v to one pin then the other to earth and you can feel the solenoid enegizing but i think the valve is stuck in the open position
david

hi to all
this morning I checked the wiring there is voltage going to RW red/white cable then I checked the nu brown/grey cable NU going to the ECU connector c0606 and there is no break in that wire so where does it go from there is it going to earth
david

Is T4 saying there's a egr fault after looking at the injector balance figures?

If it is then it's a false fault, just one of the many anomalies you'll find ;)

Russ

hi bigruss
yes but the EGR is not opening there is voltage going to the solenoid the brown/grey wire from the solenoid to the ECU is ok now if I am correct from the ECU it goes to the speed sensor I will check this next now the way I tested the solenoid was I took voltage to the solenoid then to earth started the engine and earthed the solenoid the EGR opened so there is either a fault with the wiring or there is a faulty speed sensor
david

hi to all
I think I have found the fault it is in connector co606 19 scr cable where does this cable go to from the ecu
david

hi to all
EGR FAULT SORTED I DID SOME GOOGLEING AND FOUND OUT THAT THE SOLENOID IS OPENED WHEN THE ENGINE IS HOT AND UNDER LOAD THAT IS WHEN THE EGR RECYCLES THE GASES FRON THE COMBUSTION CHAIMBER
DAVID

I would have thought that one full load it would be closed. The main reason for EGR is to reduce NOX which is produced when an engine runs with excess air (oxygen) . At full load the engine needs all its air but at part throttle the fuel is reduced and therefore less oxygen is required so the oxygen in the air intake volume is reduced by diluting it with exhaust gas. It is also operates for other reasons but the main one is to reduce NOX.