Mk5 Golf - Starting Issue but not when parked on hill!

[nickpalmer]

Hi,

Can you help??

I have a strange issue in with my mk5 2.0l diesel, it has an issue starting if its left for approx 6 / 8 hrs, it takes 5 / 6 quite long attempts to start it, its as though the diesel flows back to the tank and takes a while to get back to the engine. When it has been started once, it has no issue starting again unless left for a long period, at work or overnight.

I have recently found out that if left on a slope, this was in a car park, it starts fine!

So last night, i reversed my car on the small wheel ramps I have, approx 300mm high, to test, and it started first time no issues.

Any idea what this could be??? i am baffled.

Thanks in advance

Nick

[Crasher]

Has the lift pump in the tank been checked?

[nickpalmer]

no i have only checked for any leaks to hoses around the fuel filter, would the lift pump be likely, can this be checked or is it just replace it and see....

[Crasher]

You can run it with a suitable diagnostic system and see if it delivers fuel to the filter unit, I have also seen symptoms like yours when someone has been in there and connected the hoses up the wrong way around, yes you Mr RAC and AA breakdown chaps!