There are a bunch and most are not good that I have found. First check oil level cap look for leaking oil etc. After those it is time to have diagonstics done at a service station. Your local dealer will charge you typically 25-45. But do call they might not.
Pressure test the convertor.
it has a machanical fuel pump mounted on the engine. so there would be no pressure as you turn the ignition on, but would only get pressure once the engine has turned a few times, by the starter motor, in order to create fuel pressure. but check your fuel lines, usually they would be your problem
Fuel pressure regulator.
yes because if the valves covers are leaking what is there to contain the pressure inside the cylinder
Verification on your question: Do head gaskets make cars lose pressure....hmmmmm, I think what your asking is.... Does a head gasket make an engine lose compression. - Correct?The simple answer is yes, it does, but it is by design. The amount the head gasket lowers the compression (or pressure) is built into the overall design of the engine. For instance, if you were to assemble the head to the block, without a gasket, you would raise the compression (pressure) slightly and potentially cause damage to the engine. This would most likely become apparent when you burn out a valve or burn a hole in the top of a piston.In general terms: - The greater the compression ratio, the bigger the explosion in the bore and the more heat that is produced.
oil pump/ main bearings/ severe oil leaks/
I would check the fuel pressure and fuel filter. If you have a check engine light on, then you will need to have it checked for codes. That will mostly tell you what you need to know.
That would not account for loss.
Pull over and kill the motor immediately when you lose oil pressure, failure to do so will destroy the engine.
Oil Pressure Sensor Testing 1. Test and verify the engine oil pressure. If no or insufficient pressure exits, oil pressure problem exits and gauge and sensor are operational, repair oil pressure problem. 2. Check the appropriate fuse before attempting any other diagnostics. 3. Unplug the sensor electrical hardness. 4. Using an ohmmeter, check continuity between the sensor terminals. 5. With the engine stopped, continuity should not exist. Ø The switch inside the oil pressure sensor opens at (6) psi or less of pressure. 6. With the engine running, continuity should exist. 7. If continuity does not exist as stated, the sensor is faulty.
Dirty fuel filter, dirty air filter, bad catalytic converter, restricted exhaust, insufficient fuel pressure.
sounds like you may have spun a bearing. if so then the engine needs to be overhauled or replaced.