I thought the same, air flow into the engine should be the same so I'm suprised to see the CEL on
I'll take a look at how my company determines swirl faults, most jobs I work on use electric swirl rather than vacum so its easy to detect faults.
Maybe I need to go for a drive so any faults logged during the procedure can be cleared.

I'll keep you posted.

Jason

 

You told you did not connect the vacuum system to the pressure controller. What parts dift you left unconnected. I just thought that maybe the CEL is because of that?

edit: If you left the little tube (part 10) unconnected from vacuum box, that might be the reason for light coming up.

 

i re connected everything...the only things i did was to remove the swirl flaps and the control rod that connects them.
all pipes electrical connections etc were re connected.
no flaps
no faults
no worries.

 

yes I removed pipes 10 and 12 (12 is blocked so no leak path created) electical connector in place.
There is no electrical feedback on the swirl system so it can only be an airflow error that is causing the fault.

Mine is a 2005 car with DPF, what years are yours? if they are older the EOBD fault calibration may not be as stringent.

Jason

 

Mine is 2004 with DPF also.
I'm pretty sure it's the airflow error that makes the light.

 

Hi Jason, your problem is that you have simply disconnected the vacuum pipes, sure you have blocked them off so there are no leaks, but the electric valve will not be operating as it should and giving an error.

Everyboby that has removed their swirl flaps simply puts everything else back together and the car is fooled into thinking the flaps are working as normal.

Try reconnecting the pipes to see if the error goes away, if it does you know that this is your problem.

You could clamp pipe 10 temporarily when the flaps are open and this would disable the swirl flaps so you could see the difference when driving, although I doubt you would notice any change.

 

And you have no CEL?

 

Correct. No check engine light.
And I did the removal of flaps just like how I expressed in DIY, and just like Russ said.

 

i agree with russ, that does seem to be logical ?
give it a go.
mine are
2004 no p/f
2005 with p/f

no error codes or faults on either.

 

CEL is now off, done a couple of short drives and key cycles.
Must have triggered a fault because I did not disconnect the battery.
Apparently new engines / vehicles never fully sleep, especially if you open a door, they do a mini power up procedure.

Car feels ok so far.
I'll keep you guys informed.

Jason