typical diesel or ...??

[gadget1960]

As I was parked today waiting for the mrs to return to the car, I was revelling in the extra oomph I had found after changing the blacker than black air filter (surely must have been strangling it's breathing) car just feels more 'alive'.
Sitting there with engine idling I raised the revs to about 2,500 rpm, and noticed a definite un-balanced feel, almost like a slight misfire in a petrol motor, only for about 200rpm (2,500-2,700 rpm). Before and after those figures the cdt is as smooth as can be, in fact it really is hard to tell it's a diesel when just idling it's so smooth and so quiet.
I have heard it said that this is an inherent thing with diesels, they have sweet spots and not so sweet spots.
When driving ... it pulls through all gears with no sign of any harshness or hesitation, never misses a beat, part throttle is smooth with no 'over-run' hesitation. None of that 'pinking' sound when under load either.
Anything to look out for or am I just being paranoid? this is the first diesel I have ever owned so maybe comparing it to petrol. car has only done 59,000 and starts literally on first turn of the key with zero other noises etc:

[marinabrian]

Originally Posted by gadget1960

As I was parked today waiting for the mrs to return to the car, I was revelling in the extra oomph I had found after changing the blacker than black air filter (surely must have been strangling it's breathing) car just feels more 'alive'.
Sitting there with engine idling I raised the revs to about 2,500 rpm, and noticed a definite un-balanced feel, almost like a slight misfire in a petrol motor, only for about 200rpm (2,500-2,700 rpm). Before and after those figures the cdt is as smooth as can be, in fact it really is hard to tell it's a diesel when just idling it's so smooth and so quiet.
I have heard it said that this is an inherent thing with diesels, they have sweet spots and not so sweet spots.
When driving ... it pulls through all gears with no sign of any harshness or hesitation, never misses a beat, part throttle is smooth with no 'over-run' hesitation. None of that 'pinking' sound when under load either.
Anything to look out for or am I just being paranoid? this is the first diesel I have ever owned so maybe comparing it to petrol. car has only done 59,000 and starts literally on first turn of the key with zero other noises etc:

That is a classic sign of the EGR valve sticking open

Unplug the electrical connector from the EGR actuator solenoid and repeat that test

Follow the vacuum hose back from the EGR about 6" and you will find the electrical gubbins, unplug this

It is very common on low mileage cars that have "tootled" about most of their careers

Brian

[gadget1960]

Originally Posted by marinabrian

That is a classic sign of the EGR valve sticking open

Unplug the electrical connector from the EGR actuator solenoid and repeat that test

Follow the vacuum hose back from the EGR about 6" and you will find the electrical gubbins, unplug this

It is very common on low mileage cars that have "tootled" about most of their careers

Brian

Cheers Brian, i'll give that a bash in the morning, just about every car I've had has been plagued with egr problems. Funny you should mention the 'Tootling about' thing, the previous owner said he'd never been anywhere near a motorway in his life! (I believed him tbh... he was about 125 years old) hahaha.
Would it be best just to replace it / strip 'n' clean it (if do-able) or delete the egr?
Thanks.

[marinabrian]

Originally Posted by gadget1960

Cheers Brian, i'll give that a bash in the morning, just about every car I've had has been plagued with egr problems. Funny you should mention the 'Tootling about' thing, the previous owner said he'd never been anywhere near a motorway in his life! (I believed him tbh... he was about 125 years old) hahaha.
Would it be best just to replace it / strip 'n' clean it (if do-able) or delete the egr?
Thanks.

Disconnect first to confirm, but a strip down and clean will likely be needed, and check the inlet manifold too.

A nasty job, but once done, never need be done again......as you are not going to be recirculating spent exhaust gasses through the manifold any longer

Brian

[gadget1960]

Originally Posted by marinabrian

Disconnect first to confirm, but a strip down and clean will likely be needed, and check the inlet manifold too.

A nasty job, but once done, never need be done again......as you are not going to be recirculating spent exhaust gasses through the manifold any longer

Brian

Sorry to sound like a numpty brian, when I disconnect the egr solenoid and repeat the 2,500 rpm test, should it feel smoother at those revs or the same?
Also ... would it be an advantage to remove the egr permanently and get a blanking kit? or just remove it and give it a damned good clean?

[marinabrian]

Originally Posted by gadget1960

Sorry to sound like a numpty brian, when I disconnect the egr solenoid and repeat the 2,500 rpm test, should it feel smoother at those revs or the same?
Also ... would it be an advantage to remove the egr permanently and get a blanking kit? or just remove it and give it a damned good clean?

Just remove it and give it a good clean, and afterwards "forget" to plug the electrical connector back in, this effectively bypasses the EGR by disabling operation

And yes it should feel smoother at 2500 RPM

Brian