Question about 1994 Ford F150 Styleside Supercab

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Oil Pressure My truck is a 5.0 litre ford f-150 1994, oil pressure is good till it gets warmed up, then every time i slow down the oil pressure gauge eraticly bounces around???? Is the oil pressure doing that or is the sending unit going bad, cause while driving and when cold the pressure is normal. Ther are no sign of not getting oil. There are no knocks and ticks. I have let ot idle like that for a few minutes to see the results, just the eratic bouncing

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I have the EXACT same problem. 1998 F150 4.2L. let me know if this fixes your problem?

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Oil Sending Unit

Posted on Feb 13, 2009

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1 Answer

Why does oil pressure fluckulates


Well it could be a faulty pressure sensor, or you could really have a problem with the oil pump or engine. As the engine warms up the oil gets thinner and pressure can drop if the engine is worn out.
You can check the oil pressure by using a mechanical gauge and bypass the gauge on the dash.

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bad bearings on crank or worn oil pump. Pressure will be up when cold, but will drop when engine warms up. Check for knock in lower end. If so, bad crank bearings.

Jan 16, 2013 | 2004 Ford Super Duty F 550

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Why does my oil pressure gauge on dash show low oil pressure when slowing . or during long drives when using low revs


The reason would be physics based. Low pressure can go down to under 10 psi. and be okay. What you do is hook up an external gauge and measure your pressure, both cold and warmed up. Your pressure may be okay.

Aug 05, 2011 | 2000 Isuzu Trooper

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My oil pressure gauge go up and down pull slow


Hi!!

Either your oil pressure gauge is faulty, or, if your oil level is ok., your oil pump is blown. Take it to a repair shop for diagnostic.

I recommend inmediate attention to this problem before it becomes a mayor (and expensive) repair.

Good Luck!!!

Mar 11, 2010 | 1997 Ford Expedition

1 Answer

Oil pressure gauge shows no pressure when its cold out for about 5 minutes till it warms up 97 ford f150/4.6l. I use 10w30 oil, could there be a wire connection to the motor be shorting? where is it? Or is...


Jim, I think your oil pressure sender is going bad, you should replace it and see that your oil pressure is in fact good, you can also check and verify the wires to it at the same time. It is located next to the oil filter. Hope this helps, let me know

Dec 09, 2009 | 1997 Ford F150 Regular Cab

1 Answer

I HAVE SAME PROBLEM


Make sure you are using a genuine Ford oil filter. The Ford filter has pressure valves in it to keep the oil where it belongs. Make sure you are using the proper weight of oil.

If the oil and filter are proper, it sounds like the oil pump pickup is clogged or there is excessive play in the crank bearings. The engine is running dry on oil because it is not pumping up until the oil is circulating completely through the engine.

Sep 11, 2009 | 2001 Ford Expedition

1 Answer

Oil pressure


Have someone put a mechanical oil pressure gauge on it. If pressure is at or below 15psi hot at idle, likely you have an internal engine problem (bearings etc) If you have been driving it like this for any amount of time, and pressure is low, likely your choices are either drive it till it dies or replace the engine. If pressure is normal, change the sending unit and look elsewhere for the noise.
I know you aren't happy about my answer (no one likes bad news) but those are the facts.
good luck.

Apr 09, 2009 | 1999 Ford Explorer

1 Answer

Oil pressure gauge reads zero


THE SENDING UNIT WILL BE LOCATED DOWN BY THE OIL FILTER. YOU PROBABLY HAVE AN ELECTRIC PRESSURE SENSOR. THERE WILL BE ONE WIRE CONNECTED TO IT. THE OIL PRESSURE IS USUALLY BY THE OIL FILTER AS THIS IS WHERE THE PRESSURE IS GENERATED FROM THE OIL PUMP. THEY CAN BE HARD TO ACCESS ON SOME ENGINES DUE TO LACK OF SPACE. HERE IS ANOTHER TIP. INVEST IN AN OIL PRESSURE SENSOR SOCKET. THEY ARE A SPECIALTY TOOL AND CAN SAVE YOU SOME TIME IF YOU ARE NOT MECHANICALLY INCLINED. GOOD LUCK

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Possibly clearances "closing" at operating temparature? 20w50? Kinda heavy isn't it?Spun bearing - should make more noise than a "Tap"? I've heard several low and high mileage 2.9 engines "tap" but quits after warm up? That SEEMS to be somewhat common with the2.9 Sorry can't be more specific.

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