BMW Repair: feuling problem, fuel pressure regulator, bmw e36

Question
Have you every had an over fuelling fault on a BMW E36 318i 1997 tourer?

We have handed a lot of part on this car and it is still the same, When the fuel pump fuse is removed it will run for a bit, But when i refit the fuse it cut's out and the plugs are very wet.…

List of parts that the car has had fitted (new parts)

1) ecu (we got it coded at bmw)
2) injector and rail and valve.
3) all engine sensor I. e temp, throttle, etc.

Fuel pressure is fine, been check by Bmw.

Have you every come across this problem before, i would be very grateful for your time to reply to me

Regards
john
p.s it has no faults on the diagnostic

Answer
Hi John,
First of all, you should tell me why a lot of parts had already been replaced. What was the original problem?
Were there codes read out of the vehicle?
But the good news is, your fuel pump works.
The bad news is, more fuel than needed is being dumped into the cylinders.
Usually this is due to bad fuel injectors.
But you said you have just replaced them (all of them?).
If all the plugs are very wet, then either the injectors are bad, the fuel pressure regulator is not doing its work or the fuel return line is clogged, or the ecu/DME is giving the injectors too much open time. And this may seem a stupid question, but are the plugs wet with gas or wet with oil?
If only one or two plugs are wet with gas, then only one or two injectors are bad. But if you already replaced 4 injectors
with original ones, and they are still getting wet, then the injectors is not the cause of the problem.
You said that the fuel pressure is OK and had been checked by BMW. I hope that is true. The proper pressure should be 35 to 45 psi when running, and a minimum of 8 to 10 psi at
startup.
Something is wrong somewhere in the fuel injector/fuel rail or fuel pressure or fuel return setup. Hooking up a pressure gauge to the fuel rail/regulator can dispel some of your suspicions. I doubt that the ecu/dme is to blame if it is new and been coded by a dealer. But the Mass Airflow Meter (after the air filter)
could send the wrong signals to the dme thereby making it open the injectors much longer than needed.Disconnect the MAF the next time you start the engine and see what happens.
Also check the small diameter vacuum hose that connects to
the pressure regulator.
Kindly update me with the info I requested, and other info that you have recently gathered pertaining to the problems.
Tino