Question about 1998 Ford F150 Regular Cab

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1998 FORD F150, OIL PRESSURE DROPPING SENDING UNIT AND OIL PUMP REPLACED, COULD IT BE THE BEARING?

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YEP COULD BE WORN ENGINE BEARINGS OR BAD OIL PUMP.

Posted on Oct 23, 2011

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Posted on Jan 02, 2017

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Where is oil pressure switch on 1992 ford 150


Most oil pressure switches/sending units were located are near the oil filter. Did you have the same symptoms before you changed the oil pump? How many miles on your engine? As the bearings (main, rod, camshaft, etc) wear, the gap where oil flows through gets larger, and oil pressure will decrease. If a direct reading gauge shows very low oil pressure at idle, it's time to rebuild or replace the engine.

Apr 11, 2017 | Ford Cars & Trucks

1 Answer

Have a 2004 f150 left town took exit heard knocking oil pressure dropped to 0 then up back down is it oil pressure sending unit or pump or maybe o ring from pump to tube


Pull the sump and check the main bearings for spinning in cap. The knock indicates a bearing and the fluctuating pressure indicates a oil hole being opened and closed as the bearing shell moves over the oil hole in the crank.

Mar 21, 2013 | 2004 Ford F150

1 Answer

After driving a little while my oil pressure drops and I just replaced the oil pump, what could be causing this?


check the oil pressure with a mechanical gauge most cars/trucks have a electronic sensor to operate the gauge replace the sending unit

Aug 21, 2012 | 1993 Ford F150 SuperCab

1 Answer

1995 Ford Econoline 150 with 302 engine. Oil pressure indicator starting dropping when idle speed went down, Had a new oil pump and sending unit replaced, still does the same thing. Has 190K on it, now as...


When you had the pump replaced did anyone look at the rod and main bearings? 99% of all low oil pressure problems I've seen has been directly related to bearing wear, not a bad oil pump.
Replacing the pump will give you slightly better pressure temporarily but that won't last very long.
Verify the actual oil pressure using an external mechanical gauge. If it's low (likely it is) go back into the oil pan and use plasti-gage on the bearings to measure clearances.
In reality though, in an engine with that many miles, it's best to either completely rebuild or replace it though.

Sep 10, 2011 | 1995 Ford Econoline

2 Answers

Just replaced oil pump still have low pressure 14-20 pounds at 2500 rpms


Set your timing when u remove the oil pump it will surley affect the timing on your motor.... do this with a timing light and and adjust timing by rotating the distrubutor.

Mar 18, 2011 | Ford Taurus Cars & Trucks

1 Answer

2000 Ford F-150. The oil temp warning light came on and the oil pressure gauge dropped to zero. While accelerating, the pressure gauge goes back to normal and the warning light goes out. No drivability...


Make sure the oil level is correct. If the engine bearings are getting worn, the oil pump is worn or it's screen plugged, that can cause low-RPM weak oil pressure. Try running with 'high mileage' oil at your next oil change and always replace the filter. At some point, you may need to consider overhauling or replacing the engine. Good luck!

Jun 06, 2010 | 2000 Ford F150 Flareside SuperCab

3 Answers

What would cause a drop in oil pressure without any visible leak


the pressure bypass valve in the oil pump leaking by and not closing completely to make the pump build full pressure,or the pump is working and the sending unit is giving you a false reading,then you should have a mechanic put on a gauge to see actual pressure of the pump,don't wait cause if pressure is actually that low you will sustain engine damage soon

Apr 02, 2010 | 1998 Chevrolet S-10 Pickup

2 Answers

Oil pressure drops when idling and knock from main bearing.


How many miles on it? Could be the oil pump if the oil level is full.

Jul 08, 2009 | 1990 Ford F150

1 Answer

Oil pressure gauge shows low / high / middle changed sensor did


Hello mb4494: My name is Roger and I will help you. If by changing the oil pressure sending unit the problem did not change. I would perform a oil pressure test. This is done by removing the oil pressure sensor and inserting a oil pressure gauge. This can be done by yourself or by a repair shop. This needs to be done on a cold engine. Start the engine and observe the oil pressure cold.as the engine warms up observe the pressure. The pressure will drop off as the engine warms up.Should the oil pressure drop below 10 to 12 PSI. then you have internal engine trouble. More then likely a bearing problem. Try dropping the truck into gear and see what the pressure drops off to. Again if the pressure drops below 10 to 12 PSI. you have a problem. I would also check to make sure you have the correct oil switch. a truck with a oil light uses a oil pressure switch. with a gauge you would use a oil pressure sending unit. Sorry for the long reply but want to make sure you check the pressure correctly. Please rate the quality of the answer as this is how we know the answer was correct. Thank You for using Fix Ya. Roger

Jun 16, 2009 | 2004 Ford F150

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