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TurboKraft TurboKraft is offline
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Join Date: Mar 2005
Location: Phoenix, AZ
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+1 it sounds like a fuel delivery issue, not the regulator. Assuming:
(a) your fuel pressure is otherwise tracking with manifold pressure (good regulator, no vacuum or fuel leak), and
(b) you're measuring fuel pressure in the rails, ex: from the test port on the 3.2L Carrera's rail, and it's plumbed similar to factory,
then you're just not supplying enough fuel.

Check the voltage at your pumps. Original factory wiring + relays + fuses are all old enough to be suspect, and this wasn't Porsche's strong suit in the first place.

If good, check for flow restrictions between the tank and engine -- a kinked or pinched hose, clogged filter, etc. A new -044 pump won't help if you've got another restriction limiting flow.

TurboKraft Inc : Fuel Pump Adapter Fitting Front : Bosch 044 [999 620 993 TK] - $34.00
TurboKraft Inc : Fuel Pump Adapter Fitting Rear : Bosch 044 [999 620 930 TK] - $34.00
(Trying to get our host to start offering these.)
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Old 10-10-2014, 08:37 AM
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