mn surge when idling?

[mnbrodie]

Hey there I have a 2011 mn 2.5td and when it idles it surges I have notice this since I have put shell diesel in it the other day, not sure if that would effect it or not if anyone have any ideas please help

Thanks Brodie

[mnbrodie]

Mn sorry bloody auto Correct haha

[Photoguy1510]

Sure its not the AC kicking in and out? Makes the rpm go up and down fuel from any brand should not do anything to rpm at idle.

[mnbrodie]

Air con? Im pretty sure its not on in the car, just goes up and down around 900-950 rpm but does stop after a drive

[mIwoo]

its the egr- see other related threads

[Joel]

Automatic choke if its when you first start the car up

[Jeff Turner]

Petrol station might have just filled it's tanks therefor stirring up all the crap. You might have dirty fuel.

[Jeff Turner]

Petrol station might have just filled it's tanks therefor stirring up all the crap. You might have dirty fuel.

[mnbrodie]

Yeah it is normally when I first start the car up, I found out they filled up there tanks that morning

[Photoguy1510]

Air con? Im pretty sure its not on in the car, just goes up and down around 900-950 rpm but does stop after a drive

Mine sits at 750 and when the ac kicks in goes to 950 and down again a few seconds later. When cold it sits at 800 for the first few min then down to 750 again. Took me a while to figure out why i had these surges, so switch the ac off no more random rpm hikes.

[biggibbo]

If the ac is off it's most likely the EGR kicking in