TDi Shudder when idling

ScottyP45

Well-Known Member
Joined
May 1, 2008
Messages
1,657
Reaction score
71
Points
48
Location
Scotland
Gaaaaah! If its not one thing, its something else. It's now started shuddering from left to right when I stop at idle, when hot. Anyone throw any light on this?

I do have a diesel leak from the base of one of the injector pipes but at the pump end, bottom one nearest the block I think, looks a bitch to reach for tightening. I dont think this is the cause, more like an electronic engine mount but dont think a 96 motor will have them will it?

If you switch off for a minute, then restart, the shudder is gone, and only appears at idle anyway, even 1k rpm its as smooth as butter, but at 800 idle its rough sometimes.
 
its a 96 motor mate, did they have dmf's that early?
 
If its a 90Bhp it had single mass, if its 110 then more likely DMF. I would check the smooth running on the cylinders with VCDS/vag-com in measuring blocks nr 13. If they all close toghether then it does not point to a injector missfire. You could also check the cylinders pressures with a Diesel pressure tester...
 
yep sounds more likely mate, looks a bitch to get to, any procedure to know before cracking the unions off? ie there shouldnt be any residual pressure in a Di system should there, unlike a common rail?