Drinking too much
beer in Munich ;)
Join Date: Feb 2012
Location: I would rather not say
Thanks for the info. Mine did it before and after an EGR clean.
I'm not saying the EGR isn't related to any juddering issue, but the juddering now is no worse than when I got it, and since then I've done a functional test of the EGR, an intake clean and lubricated the solenoid.
It's a very harsh juddering I get, at between 2-4 times a second, almost like yo get immediately before an engine stalls.
I was going to look elsewhere than the EGR, because the symptoms are that there's no Judder from 800-1050 revs, then it is prone to juddering until the revs reach about 1300-1350 revs.
The swirl valve actuator on mine is the later type which is mounted under the manifold. Actuating it in AlfaOBD proves it moves freely both ways very quickly.
I wondered if it wasn't the case that they open, or close, very quickly, immediately affecting the intake pressure, and then detecting the quick change of pressure the ECUresponds by moving the flaps back again, setting up an oscialltion.
Probably barking up the wrong tree but thats what I was going to look into
Last edited by FixitSan; 05-11-12 at 12:47.