I'm trying to fault find and establish what is inside the EGR module on the C5 x7 diesel 2Ltr.
I presumed the actuator on the side moves a valve inside, but with a lot of electrical wires going in...is there another electronic valve inside.
I have a problem where the engine drops in revs in a jumping manner, and it looks like a feedback loop of something between the airdoser valve and the EGR valve or valves.
As the airdoser closes to force air from the EGR into the engine but somehow there is not enough from either making the engine drop in revs after which it goes back and repeats the drop again and again. I heard the phrase kangaroing used.
If anyone has any suggestions why this kangaroing is happening then I'm all ears. When driving it manifests itself as a hesitate of the engine
C5 x7 EGR unit, what's inside ?
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Re: C5 x7 EGR unit, what's inside ?
I think there is a stepper motor in the EGR module and perhaps a position senor to relay the actual position back to the ECU.
Whilst I can't recommend blanking the EGR valve off with a simple plate for legal reasons, you could maybe try it as a 'diagnostic aid' to see if the behaviour stops or changes in some way? Then at least you’ll know if you’re in the ballpark.
Does your engine have the 'double doseur' or single?
Whilst I can't recommend blanking the EGR valve off with a simple plate for legal reasons, you could maybe try it as a 'diagnostic aid' to see if the behaviour stops or changes in some way? Then at least you’ll know if you’re in the ballpark.
Does your engine have the 'double doseur' or single?
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Re: C5 x7 EGR unit, what's inside ?
If it's the same as the 1.6hdi it's a stepper / servo motor that operates a mechanical butterfly. You can take them apart and test each 1/2 separately.
Not a great picture but on page 1 you can see the 2 halves, the very black pic is the motor side.
viewtopic.php?t=64723
Not a great picture but on page 1 you can see the 2 halves, the very black pic is the motor side.
viewtopic.php?t=64723
Pete
Notice the BX is still top the list but sadly gone
Notice the BX is still top the list but sadly gone
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Re: C5 x7 EGR unit, what's inside ?
Her C5 has a single doser.
C5 x7 2.0 HDi 160 hp Estate exclusive, the newbie
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Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
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Re: C5 x7 EGR unit, what's inside ?
Hi guys, thanks for the replies, but are you all saying there are two gates or valves the the EGR.
I found a blanc plate on the exit port of the EGR, removed it and my kangaroing has stopped. Probably because it can't choke the engine now the EGR is open.
Oh, Bela is a man's name lol
I found a blanc plate on the exit port of the EGR, removed it and my kangaroing has stopped. Probably because it can't choke the engine now the EGR is open.
Oh, Bela is a man's name lol
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Re: C5 x7 EGR unit, what's inside ?
And this was my second thought.
There was a bust of him in front of the hotel we stayed in 2011 in the small town of Jimbolia in Romania. He was born in the nearby town of Sânnicolau Mare.
There was a bust of him in front of the hotel we stayed in 2011 in the small town of Jimbolia in Romania. He was born in the nearby town of Sânnicolau Mare.
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson
Inside every old person is a young person wondering what the hell happened.
"Trying is the first step towards failure" ~ Homer J Simpson