So I've had my 99 4x4 FFV for about 2 months now. I decided to change the oil 2 weeks ago. I went with Castrol Syntec 5W30 and a Motorcraft filter. For the past 2 weeks, the engines been running smoother, I've been getting a little better MPG's and it seems to be running quiter as well. All was well until this morning...

I got into my truck and started it up. All gauges went to normal postitions (including the dummy Oil Pressure). I waited for a minute because it was kinda cold here last night (got down to about 45-50) and while I'm sitting there, the oil gauge dropped to nothing. I didn't hear any change in the sound of the engine, and procceeded to shut it off. I waited a couple of minutes, checked for leaks and oil level, and everything looks fine. Plenty of nice clean oil, no drips whatsoever. So I started it up again. The gauge jumped up to the middle, like normal, and stayed there. I drove around a little bit today, and it seems fine. Gauge didn't move, and I just checked the level and it's still normal.

Could it have been a fluke? Or should I check out the oil pressure switch and pump? What would guys recomend I do?

 

they like to act funny on ya..seems to happen to alot of us

 

my 01 did the same thing, excpt i was going down the road. i stopped and checked everything and it was fine. a fluke i guess?

 

What would be the part that was to blame though, the pressure sending switch? That's only a couple bucks and not to hard to change, so it would be worth the peace of mind.

 

working at the dealership we see the oil pressure switches go bad from time to time

 

the "gauge" on our trucks is a dummy gauge... if you want a true oil pressure gauge you will need to install a aftermarket one... just replacing your stock sending unit will fix the current problem assuming that you dont have a oil pressure problem which is doubtful

 

Oil Gauge Sensor on these are crap.
I replaced mine this spring. When the cold weather hits, my dummy gauge would take a few seconds before popping up. Replaced the sensor, no problems since. Just costs a few bucks too and easy to replace.

Off the box:
Motocraft
SW-5192
F75Z-9278-CB