EGR Valve

[gilbert121262]

Had the EGR valve replaced today, picked car up and all was well, felt smoother and pick up from low revs much better. 3 miles away from garage gentle acceleration from lights and straight back into limp mode!!!!! Took it straight back and it now showing "Inlet port shut off motor fault. Now I know these engines are prone to this but this was not showing up on wednesday when it was plugged in and the EGR fault was showing. He cleared the fault and all was well. Decided to come home the long way via motorway, gave it a good blast taking it right up the revs. Car was fine. Now my question is this. Was it just an amazing coincidence that this fault popped up after EGR changed or as he said to me it could be related. When he took it for test drive he said it chucked some crap out of exhausts almost as if valve not been working for a while and it was cleaning itself out. Are the inlet port motor and Egr related in any way. Hope you understand this ok and someone has a view to whats happened..

 

[gilbert121262]

banging my head on wall over this problem. Done some digging on internet, lots of posts about inlet port motors. Cant see any relation between this and EGR valve. Now if the motor has blown why not all the time. Took out this morning all well on start up, after about 2 miles limp mode. Turned it off then on again and all ok. Have noticed that is pulls thoriugh revs better. Now is the motor ok but the flaps are sticking or is it the other way round. Help

 

[st4]

The motor won't be blown, the swirl flaps in the inlet manifold will be sticking. EGR is a cause of this as it drops deposits into the manifold and oil from the turbo leaks, damaging the IPS motor. Because of EGR your manifold will be gunked up, and to operate the swirl flap the motor would have to work harder. Too many variables.

When cold they don't stick, once warm they do stick. Had it on mine.

The fix:

You need a new manifold and IPS motor, expect to spend over £1500-£2000 like I did early this year.

 

[gilbert121262]

Not what I wanted to hear but thanks for the info. Is that just for part. Why just after replacing EGR, any thoughts.

 

[st4]

Parts and labour. EGR valve failure IIRC isn't a common one on the 642 engine. Your symptoms of the car working then failing once warm are exactly what I had when I had the gunked manifold.

 

[gilbert121262]

Ok thanks for the help. 10k miles ago had this problem and had it all cleaned out. Think it involved spraying something into the inlet. All was fine until this week. So will I have to have both inlet manifolds replaced. How come when it goes into limp if I turn off and on it works fine for the rest of the day?? If the flaps stick surely they will stick again 3 miles later or am I missing something here.

 

[st4]

Ok thanks for the help. 10k miles ago had this problem and had it all cleaned out. Think it involved spraying something into the inlet. All was fine until this week. So will I have to have both inlet manifolds replaced. How come when it goes into limp if I turn off and on it works fine for the rest of the day?? If the flaps stick surely they will stick again 3 miles later or am I missing something here.

I had this, if it cools down sufficiently the flaps operate but eventually it rejams.

 

[gilbert121262]

Did'nt do it today, weird

 

[st4]

Give it a long run, it will eventually drop into limp home mode. Mine was once drivable for about 30 miles without the fault, and once it went in and out of limp twice on the same run.