86 econoline 150, OIL guage ( L or H), should run in the middle (normal), after driving awhile it remains below the L, and my EMISSIONS light is constantly lit up??? And been stalling, just had the fuel pump changed, thought that might be it, but nothings changed. Ideas?????

check ECM mod on side of distuber

the first thing to try is turning the heater upto full heat(a/c off)if the temp guage goes down THEN CHANGE THE THERMOSTAT...(hot oil,if too hot, is thinner than the normal sae rating so the oil pressure will be lower.otherwise no real problem.

temp guages are just a guide,they vary considrably,and as long as the car runs fine,no warning lights/lack of power all is fine....(depends what you are used to,mine runs at 110 with a guage from 80 to 120.)

sounds like your sending unit needs to be replaced cheap fix and if your oil pump losses all its pressure you will begin to hear knocking coming from your motor from the top under the heads.

Hi:
Usually your oil light doesnt come on unless you have less than 10 lbs of oil pressure. You either have a bad oil pressure sending unit, or your engines oil pump is bad. The only way to verify your engines oil pressure is to buy a direct reading pressure guage and install it on your truck, or have a mechanic check your engine oil pressure. Eitherway, you need to do something soon, because the long term effects of running with low oil pressure will ruin your truck engine.

long shot when message says guages and the vehicle shuts down it may be going into protection mode i would check fluids on the four wheel drive units like isaid longshot hope this helps

bout the oil pressure gauge its normal to go up but not to high coz u might overheat, try checking the cylinderhead gasket if there is pressure coming out, replace the gasket if needed

The pickup tube is a bad design in these engines, I have fixed several with the same problem, you can weld on a GM screen move it 1/4 of a inch away from the pan or add 1 inch to the bottom of the pan, (use a high volume pump) the problem is the screen is too close and too small and will pick up any sludge off the bottom. also it's great to make a access plate on the bottom of the pan using a Volkswagen Bug oil cover plate, it can be removed with bolts after a oil drain to clean the screen without the hassle of removing the whole oil pan by lifting the engine on these trucks. Good Luck

You either have a loose/worn engine bearing or a worn out oil pump, do not drive the car this way, you will cause serious damage to the whole engine. A oil switch is for a light, it turns on the light when oil pressure falls below about 10 PSI, a sending unit is for a guage that shows oil pressure with a scale, it may have numbers on the guage or just green and red, or high and low.

The gauge can very well be "lying" to you.

As a precaution, I would do a routine cooling system service on it. This includes completely flushing the coolant, replacing the thermostat and radiator cap (believe it or not, a bad cap can cause issues too).

On the few Fords I have owned, mine were always in the middle, or to the left of the middle.

Motor homes should run cooler actually, beings as they tend to have heavy duty large capacity cooling systems.