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the 2 "regulators" are actually a fuel pressure regulator and a pulse damper. They are situated at the rear of the engine. They can be adjusted but if you need to adjust the pressure regulator its probably because something else is wrong. check the pressure in the rail by unplugging the cold start valve and sticking your fuel pressure gauge on the end of the hose originally connected to the CSV. with everything tightened up you should read 28 to 30 psi on the gauge with the engine running. if not you have a supply problem, pump, filter etc or the regulator is going out. when you switch off the pressure should stay up around 20 - 30 psi for a goodly few hours. Mine will happily hold overnight at 20psi plus with no problem.
cheers
barri
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