I feel sure you have checked to see that the engine has oil in it. You need to install an external oil pressure gauge, the mechanical type and check for pressure. If it shows that you have oil pressure then your sending unit is defective.
THE NORMAL GAUGE PRESSURE SHOULD STAY AROUND 12 TO 19 P.S.I
Did you check the fuel pressure? You may be running out of fuel. There is enough pressure in the fuel line when you have the key on, and the pump is pumping but as you use up the fuel in the line the fuel pump can't keep up and you lose pressure and the fuel shuts off. Get a fuel pressure gauge and hook it inline on the fuel rail and see what pressure you have with just the key on, and then start and run the engine and watch the gauge. If the gauge drops, your fuel pump is likely on it's way out.
I'm Pretty sure the Z28 has to have 58lbs of pressure.That could be causing your problem.
My guess is that maybe a relay or fuse has went bad in the electrical system, causing the security light to stay on constantly, therefore leaving a circuit open. This could be draining your battery, which is why your car is dead.
Try replacing oil sending unit with a mechanical gauge to determine actual oil pressure Low oil pressure may be due to excessive internal engine wear
I have a 1994 Mercury Cougar that runs good but burns alot of fuel and after the engine starts the and gets some heat, oil pressure gauge indicates low when there is nothing wrong. I have the same problem with a 1991 Mercury Cougar 3.8, doesn't burn fuel that much but a mechanician told me that it might be a miscontact on the gauge indicator, some dirt in oil pan blocking oil pump or the oil pump is going off. First thing to do is changing oil and filter replacing it by syntec oil in it so it will stay in engine more time when heating. If after that nothing changed check oil pressure at a local garage.
Defective oil pressure sending unit? Try installing a manual gauge to check oil pressure Could be excessive engine wear due to mileage Weak oil pump
Everybody Just Stay Calm - 1994 was released on: USA: 26 November 1994
youve got to be more specific.
Not really a good sign. Have the oil pressure checked with a mechanical gauge at the engine when cold. If good, then have your sensor replaced.
I would suspect fuel delivery problems. Start with replacing the fuel filter. If it still has trouble have a fuel pressure test done to test the fuel pump and fuel pressure regulator.
Bad fuel?