Then you have a BAD fuel pump. Replace the pump and filter. If it is higher then 63 LBS. then the fuel pressure regulator is bad.
do fuel pressure test
NO nothing hooks to it.
Between 55-60 psi
YES. Bad fuel pump pressure can cause that problem too.
To find the misfire, check the crankshaft sensor on the 1999 suburban. Check for the proper fuel pressure, and check the ignition coils.
In the fuel tank.
In the fuel tank.
Fuel pressure regulator is located on the driver side fuel rail.
in the tank
with the ignition switch OFF, break the fuel lines loose slowly. there may be some fuel leak out, but that is normal.
what is the fuel pressure for a 1999 isuzu npr 5.7L fuel injected?
Located in fuel tank Probably have to be removed