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savinimark

savinimark 8/16/2017

2001 Mercury Grand Marquis LS 8 Cyl 4.60L

Engine

Flutuating Oil Pressure Gauge

Ok.. So I have a 2001 Mercury Grand Marquis. When I turn the car on the oil pressure gauge acts normally, but if I have been running it for awhile, and I pull up to a stoplight, or have to idle for any period of time while in Drive and not Neutral, my Oil pressure gauge will fluctuate slightly. It doesnt' drop the whole way up and down, it just shimmies and shakes This is new for my car and I'm wondering if it's a problem foretelling bad stuff down the road or just an older car with over 200,000 miles on it showing wear and tear. Thanks in advance for letting me know what might be wrong guys

2 Answers


Jimm

Jimm 8/17/2017

First question - what is the engine oil level (with the engine cold)? Have you already checked and refilled as necessary? How many miles since the last engine oil and filter change?

If all these conditions are normal, then there several possibilities; faulty oil pressure switch, faulty oil pressure gauge, faulty pressure gauge wiring, or worn oil pump.

Try these on-line resources for the replacement parts: www.autopartswarehouse.com, www.partsgeek.com, www.rockauto.com, www.partstrain.com, www.autoanything.com - to list a few.

For example, they (RockAuto) list the replacement oil pressure switch from around $3.20 for your vehicle.

Oil pressure switch = MOTORCRAFT SW7676 - or it's equivalent

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0
Jimm

Jimm 8/17/2017

First question - what is the engine oil level (with the engine cold)? Have you already checked and refilled as necessary? How many miles since the last engine oil and filter change?

If all these conditions are normal, then there several possibilities; faulty oil pressure switch, faulty oil pressure gauge, faulty pressure gauge wiring, or worn oil pump.

Try these on-line resources for the replacement parts: www.autopartswarehouse.com, www.partsgeek.com, www.rockauto.com, www.partstrain.com, www.autoanything.com - to list a few.

For example, they (RockAuto) list the replacement oil pressure switch from around $3.20 for your vehicle.

Oil pressure switch = MOTORCRAFT SW7676 - or it's equivalent

Reply
0

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