Why would a 1993 Pontiac Sunbird 31 lose oil pressure when idling at proper running temp and then it returns at higher RPMs?
well, oil pumps are power by the engine, when the engine is at idle its at its lowest rpm when you step on the gas the rpms get higher therefore your oil pump works faster delivering oil at a faster rate to keep up. oil pumps got a valve call the pressure relief valve and that valve maintains proper oil pressure at all times. if the valve fails you may experience those kinds of problems. it could also be that the rotors or gears on your pump are worn out beyon manufactures specs. and they not providing proper pressure. another answer to your problem would be low oil level and or faulty sensor.
I think, and I THINK it is under the plastic cover on the left side of the engine, at least it is with a 2.0 4 cylender motor. You have to remove the belt covor than the belt, than the sensor should be visible. I say this because i read it in a Pontiac manual, that plus there are wires running in to the covor. Hope it helps
While showering why does the water pressure suddenly get very low and then grow stronger a minute or 2 later?
Do you have your own well? If so the pressure switch has kicked in and the pump is running. If the pressure tank is in good shape, there is usually enough residual pressure in the piping system to be suitable, but when it drops the pump kicks in and that can take a bit. Did someone flush a toilet? A toilet refilling will take water out of the system, thereby reducing the system pressure. When…
maybe its your alternator, if its giving off a weak enough charge, when you put the brake lights on, it drains too much power to run your engine. to check the alternator, start car, and remove the positive cable from your battery with some accesories running. if your car sputters, or stalls, just replace the alternator. hope this helps.
With key on engine not running pressure should be 9 to 13 psi Engine at idle pressure should decrease by 3 to 10 psi on a throttle body. On a multi port injection key on engine not running pressure should be 41 to 47 psi. Engine running at idle pressure should decrease 3 to 10 psi. Central multiport fuel injection key on not running should be 58 to 64 psi. Engine running at idle pressure…
My pa says follow the throttle cable and you will find a nut that turns to adjust the idle. You can do this when the car is running, making it easier to see how much adjustment it needs. He says a half turn or full turn either way will usually do the trick. I need to find a diagram or picture for the throttle cable but hope that helps a little
Why does my 1994 Ford Explorer lose fuel pressure after running for a short time shut off vehicle and start it back up and fuel pressure returns?
Sounds like a bad fuel pressure regulator. That may be, but my experience with fuel pressure regulator failure was major overloading with fuel. This regulator is vacuum operated and when the diaphagm fails it won't open and allow excess fuel to return to the tank. Rather, I would presume it to be the fuel filter needing replacement.
The assumption is that it's cranking normal but not catching. If it's cranking slowly, have the battery and charging system tested. If that all checks out, it might be bad bushings on the starter making it crank a little too slow. If it's cranking ok, it's probably something else. Start by reading the dagnostic code. If that doesn't give you any clues, try running the engine at night, in the dark. Look at the engine…
Why would a 1998 Pontiac grand am engine stop running randomly We ran a full diagnostic check no codes show?
Why would my1990 v6 3100. Pontiac firebird leak coolant while i pour it in radiator when its not running?
Because you have a coolant leak. Just because it's not running doesn't mean it can't leak.. the car not running just means that there isn't going to be heat to open up the thermostat. Coolant can still leak out. You can rent a pressure tester and adapter cap for that vehicle, pressurize the system, and locate the leak in order to fix it. You might have to replace a hose, or you might have to…