Quote:
|
Originally Posted by TheRangerOfDanger
I don't know for sure, but my ranger (1990) has an oil pressure gauge, not a gauge that measures the amount, and i would guess that your's is the same, so when it is atr half, that means that your oil pressure is just right, but i can't say why it goes to zero, you sending unit may be bad.
|
I found this one a few years ago. The way that Ford designed the oil pressure sending units on the Rangers (and a few other models) is the sending unit sends only 3 signals to the gauge. (1) Low or no oil pressure. (2) Normal oil pressure. (3) Excessive oil pressure. What you need to do is get a manual oil pressure tester from the auto parts store (this should be about $25). Unscrew the the oil pressure sending unit from the engine, and then screw in the oil pressure tester. Now start the engine and as it warms up watch the guage, it will most likely start around 40 psi with the engine cold (~70 degrees). As the engine warms up the oil pressure will drop some (this is normal). Once the engine gets to full operating tempurature, the oil pressure should level off above 20 psi. If it does not, chances are you have a clogged pickup screen. You can change this with the engine still in the truck if you unbolt the engine mount bolts, lift the engine, and then place a 2 x 4 block between the engine mounts and the frame. If you do-it-yourself, it should take 6-8 hours to fix this.
With your gas leak.... you are right, it is a serious problem, but it is usually an easy problem to fix. Usually this is just a leaking gasket around the fuel pump/ sending unit on the top of the tank.
First, remove as much gas as possible from the fuel tank (drive it back and forth to work for a few days until it is about empty is the easy way, or syphon out the gas). If you don't drain the tank, you have to fight the sloshing of gas. Next unbolt and lower the fuel tank. Disconnect fuel lines and wire harnesses as necessary. There will be a ring around where the fuel pump/ sending unit enters the fuel tank. With a brass punch (a flathead screwdriver will work if you are very carful) and a hammer, gently drive the locking ring in a counter-clockwise direction to unscrew the ring. Lift the fuel pump/ sending unit from the tank and replace the o-ring seal. Do just the opposite to put the truck back together.