Trouble Starting In The Morning

[dave_m]

Hi there,

 

I have been having trouble starting the car 51 plate 1.9TDi in the mornings recently or whenever it has been left sitting for a good few hours, particularly in the cold weather, It starts for a couple of seconds (Runs very Rough) then cuts out and then you have to crank the engine constantly for about 30 seconds then it starts and runs fine, It will then run,stop and start perfectly all day. There are no faults showing in VAG COM so I am a bit puzzled as to what it may be and am releuctant to let a garage start guessing at my expense!

 

I have changed all 4 Glowplugs and this has not helped, I checked the old glow plugs after removing and they were all ok.

 

The car has done 150k, Last work carried out on it was Cambelt and Waterpump about 10k ago

 

Any Ideas on things to check/get checked will be gratefully received!

 

Thanks....

 

Dave

[mumof4]

fuel pump problem maybe??

[big_kev]

Is there actually any power getting to the glowplugs ( fuse or relay gone) ?

[dave_m]

Glowplugs are definately working, Tested Voltage with Multimeter whilst activating Glowplugs with Vag Com.

 

Could possibly be a fueling issue I suppose, but I can clearly hear the whoosh of the fuel pump when I turn on the ignition so I don't think its the fuel pump.

 

any other ideas??

[tdi90]

I had the same syptoms on my 99 TDi, which turned out to be fuel pump foooooked.

 

quick test;

leave engine running for a few minutes, switch off, clamp the fuel supply and fuel return hoses to the fuel pump.

Leave for a few hours or over night, then try to start the car. If it starts fine then the fuel pump is at fault (non return valve knackered)

[JohnR]

I like it! That's a handy tip to remember!