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Old 09-25-2012, 09:06 PM   #278194
briangl92
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Join Date: Apr 2010
Location: Scotts Valley
Posts: 9,515
My Ride: A08 ZSP ZPP SULEV
Kalim, the master tech came out and said the injector noise is typical of the M56. Apparently the larger injectors they run are just noisier.

I still find it interesting that with the same 2.5L block, it has a larger intake diameter and higher flow injectors than an M54. Makes you wonder what kinda power it'd make with a good tune and one less set of cats

Apparently the pressure bleed off is also normal. He said there's a purge valve in the pump. He said on rare occasions the valve can go bad but starts will take on the order of 5+ seconds.

The fuel tank filling issue is an issue they're gonna look into though.
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