Depending on mileage--could just be a sign of engine wear Remove oil sending unit and replace with mechanical gauge to determine actual pressure
Because your oil pump and/or oil pump bearings are dying.
water in the fuel can cause an idling motor to sputter and/or die.
It's common in almost all vehicles, the faster the engine is revving the faster the pump is working. The only time you really won't notice is in a dry sump application. You may notice it more frequently with oil breakdown as well.
my 1990 300zx is idling rough what could cause this?
old fuel filter
Yes, it could.
The radiator cooling fan is most likely not working.
Unmetered air sneaking in to the intake. Look for vacuum leaks.
Normal would be 25-30 psi. 10 psi would be the minimum.
no
The most likely cause of a 1992 Ford Aerostar stalling while idling is bad spark plugs. The plugs should be changed and the timing checked to resolve the problem.
Could be your timing belt.