On a 1984 Nissan 300zx does the fuel pump turn on with the key or is it engine controlled on a 1984 Nissan 300zx?
What can cause power loss at the fuel pump when plugged in but have power when unplugged on a 1996 Cadillac Sedan De Ville?
Your 1990 Cadillac Sedan De Ville is not getting any pressure to the sensors and the fuel gauge and AC gauge isn't showing up?
Why would 1984 TC FI not start unless pressed on gas and stalls when idling even after replacing fuel filter air filter O2 sensor cap and rotor spark plugs spark plug wires and checked the PCV valve?
On the fuel rail ( there are 2 fuel rails that connect to the injector bodies on v-8 cars, only 1 will have the valve) there is a small Schrader valve, if you are familliar with putting air into tires this valve should be easily seen. Take the valve cap off (don't loose it though) and attach a fuel pressure meter, these can be bought or in some cases rented from auto parts stores then…