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Old 09-11-2006
diocide's Avatar
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Oil Gauge acting funny.

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?
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Old 09-11-2006
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they like to act funny on ya..seems to happen to alot of us
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Old 09-11-2006
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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?
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Old 09-11-2006
diocide's Avatar
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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.
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Old 09-11-2006
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working at the dealership we see the oil pressure switches go bad from time to time
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Old 09-12-2006
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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
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Old 09-12-2006
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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
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