Here is a picture of a typical bigport fuel rail...
On the left hand end (rear of engine) there is a fuel pressure regulator (FPR). It's job is to maintain
fuel pressure of around 40psi in the rail to feed the fuel injectors. At the other end of the rail is a
somewhat similar device (not present on all 4AGE's) called a pulsation damper. If you removed the
pulsation damper and mixed the copper washers up when replacing it, that can cause a problem.
If the FPR is leaking fuel it may be broken. If the spring or diaphragm inside fail then the FPR will
not function correctly and there will not be sufficient pressure in the rail to fuel the engine. Pull the
skinny vacuum hose off the top of the FPR and crank the engine. If petrol comes out that spigot
the diaphragm has failed. If your plugs are still dry and there is no strong smell of petrol after you
have been cranking, then the spring may have failed.
It should not be leaking so investigate and see if it is just something loose. There is an O-ring on
the end that pushes into the fuel rail and a clamp on the hose. Check them both.
Cheers... jondee86
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