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Robj
18-02-2008, 12:01 PM
Hi. This is my first post so please excuse if im not doing this right.

I have a seat Leon TDi 150 Cupra that doesnt start straight up in the morning or after all day of standing.
As soon as its struck up the first time then it fires straight away all day unless you leave it quite a few hours.

I have had a temp sensor change and glow plugs checked.

Anybody help me with this?

Thanks

Rob
passat>sport
28-02-2008, 10:50 AM
Tandem pump leaking/drawing air into the fuel system! It can be the seal (replacement pump needed) or maybe the bolts have come a little loose (and they do) or the gasket. Check it to see if there are any wet bits around it.
Robj
29-02-2008, 09:43 AM
Thank you i will try that. Appreciate your help.
darren_mcvicar
29-02-2008, 06:46 PM
give it a drink of red bull! mite give ut some wings
Robj
06-04-2008, 08:33 AM
Hi, Just an update

I have changed the fuel pump in the top of the tank and the problem is still there.

Any other ideas

Thanks
Robj
06-04-2008, 08:34 AM
Sorry,

I Have also changed the t peice on the top of the fuel filter.

Its obviously drawing in air from somewhere
passat>sport
06-04-2008, 03:47 PM
From the tandem pump thats bolted to the rear of the cylinder head.

Try changing the gasket, If still the same it's a new pump time.

It could be something else of course, but the tandem is the main culprit for drawing air into the fuel system.
Robj
18-04-2008, 05:52 PM
Hi, Just another update

Changed the tandem fuel pump and still no joy. Any other idea's?

Could it be a crank sensor?

Just keep throwing money away.
Robj
12-05-2008, 11:23 AM
Just an update.

Been in at VW for the last week. They are now changing the injector seals.

Hopefully be all sorted by tomorrow.
ajrz3ma
20-05-2008, 07:32 AM
Hi . Just wondering if you have had any luck? I've got a TDI 150 Golf what is doing the same thing.
Many Thanks Adam.
Robj
20-05-2008, 08:27 AM
Hi Adam,

Yeah got the car back a couple of days ago. The Changed the Injector seals and its all running fine.

They did say it would either be a tandem fuel pump or those.

Worth taking it to VW for them to have a look. But its not cheap.

Rob
ajrz3ma
20-05-2008, 07:44 PM
Ideal. Good here all running ok. I've only had my golf for 2 weeks but come from a second hand dealer! I am a mechanic but i'm no good on these new diesel engines. I've got warrenty on this car but trying to tell the garage what to check and replace, i give up! Cheers for getting back to me.