luma46

I am trying to fix some ‘stumbling under heavy load/high RPM problems’ on my 2000 3.8L Mustang. I changed the fuel filter, but even after that, the fuel pressure measured on the injector rails is just a notch over 30 PSI.
What I cannot find out is the fuel pressure regulator. I was expecting a vacuum controlled regulator on the feed line, I do see something resembling a regulator, but no vacuum connection to it.
I checked the Haynes manual and it says “on models 1999 and later, disconnect the electric connector to pressure regulator”, but it doesn’t say/show where.
Is it the pressure sensor on the driver’s side injectors’ rails feeding the signal to pressure regulator somewhere?
Any help would be greatly appreciated.
Lumir

Bobby Mcdermott

I have the same question where's the pressure regulator valve on his 2003 l and what is my fuel pressure supposed to be you'll start and run fine for a few seconds and then idles rough and die osprey some starting fluid in it and it is carburetor cleaner in I s and it starts to run fine like it's locking fuel help me