hard starting ~ cranks forever when >60

My driveway is sloped and when I park it so the
Rear wheels are higher, it starts right up, and there is way less air in fuel return line.

What’s that mean?

Dadwagon said:

My driveway is sloped and when I park it so the
Rear wheels are higher, it starts right up, and there is way less air in fuel return line.

What’s that mean?

Click to expand...

That means that I'm goin to recommend you check all your fuel lines and filter connections for leaks allowing air in as this seems likely to be the issue.
The fact that the angle of the vehicle making the fuel tank at, or above, the level of the filter and pump says there's a possibility of the pump not being to blame, of course that's just a possibility.
I would definitely try a check valve in the return line before you have further damage of the tandem pump.
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Thanks for the reply,
I did installl a check valve in the return line, doesn’t seem to help though, going to check all the fuel fittings and hope its not the pump.

Safe to say that if no leaks in fuel lines are found i have a faulty tandem pump?

I have no running problems, and don’t think the injector seals are leaking because i have no fuel mixing with oil.

Would a leaking injector seal definetely put oil in with gas?

Could it still possibly be a leaky injector seal?

I replaced my fuel lines in the engine compartment with diesel approved fuel lines from my local diesel fuel injector pump repair service. $5.00. VW wanted $235.00 for the 2 hoses plus labor.

I just replaced the starter ordered off ebay from a place in Logan ?West Virginia.
Now it fires so quickly it can't wait to start.
Just bought a starter for a different car and it fires the same way.
Good luck , Dave

Have you replaced the temp sensor? It can easily cause this.

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eddieleephd said:

Have you replaced the temp sensor? It can easily cause this.

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I have not, where is the temp sensor located and how much are they$?

Behind the tandem pump and $30ish at the dealer.

http://forums.tdiclub.com/showthread.php?t=445408

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I would read the values first, no point on wasting money on a new ect, without measuring it first.