[Kim]

The gauge, since the last oil change about 2 weeks ago, ha become very jumpy when the car (more specifically, outdoor air) is warm. Bounces around a lot like it is making a poor connection somewhere. Stays at 4.8 - 5 all the time at highway speed when the air is old, falling to about 3.5 at idle. When it is warm is bounces between 3 - 5 at speed and 2.5 - 3at idle. The sender was replaced last summer so I doubt that is it, especially when outside air cold (ie 5C) is work perfectly. Is there an obvious place to start looking? I don't even know where the sender is so I will need instructions starting at an earlier place than most.

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[RS Barn]

Kim,

How you doing.

Generally when I see fluctuating oil pressure guage there are two things that cause problem.

1. The connections at oil pressure sender on block, have either bad/frayed connections or are oil soaked

2. oil pressure sender is bad. Not likely just due to oil change.

I would advise to check and clean the two connections to the oil pressure sender.

I can send a picture if you really need it,\

Pete

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[rustech]

I agree with what Pete stated above. Usually when it is the sender however, it is a constant misreading of the oil pressure. When it is erratic, it is usually a grounding somewhere. The gauges are notorious for their grounding issues. After cleaning the connections on the sender, I would suspect the gauge itself.

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[Kim]

Hi Pete - yeah, the pic would be great.

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