Engine rev-up on starting

[f13ldy]

Sometimes I will start my motor and the engine will rev up as if I had my foot on the gas. It only lasts a second or so, but it can be quite alarming.

Its a PD130 TDI.

Any idea what is going on?

Cheers

 

[Masterm8fo]

is this not the cold start mechanism ??

 

[MikeA3]

Hi,

got the same engine, mine goes up a little - only to about 1500 revs though and then back to idle speed.

how high does it rev then?

Mike

 

[f13ldy]

[ QUOTE ]
Hi,

got the same engine, mine goes up a little - only to about 1500 revs though and then back to idle speed.

how high does it rev then?

Mike

[/ QUOTE ]
It goes to about 3000. But it is quite intermittant (2-3 times a week) and the outside temp doesn't seem to have any bearing on when it does this.

Cheers
Carlos

 

[MikeA3]

To be honest i'm not sure, sounds very odd indeed!

Might be worth posting this in the diesel forum as well, they can answer most questions about oil burners

Mike

 

[jojo]

[ QUOTE ]
Sometimes I will start my motor and the engine will rev up as if I had my foot on the gas. It only lasts a second or so, but it can be quite alarming.

Its a PD130 TDI.

Any idea what is going on?

Cheers

[/ QUOTE ]

My Passat Tdi PD does this occasionally, it only seems to happen when the engine is started up when its warmed up. I've had VW do a check up, and they can't find nothing wrong /ubbthreads/images/graemlins/noidea.gif

 

shouldnt think its a problem tbh, could be any manner of things but nothing i can think of that would cause damage.