High Oil Pressure AE86

[Swooki]

Hey so i was driving today and everything was cool until i noticed that the Oil Pressure went to High. I noticed it when i was at the night waiting to turn left. When the light turned green i went to a parking lot and parked and before i got to the parking lot like at the entrance (dip) of the parking lot it was to Low again. This is how low it'll get and when i start driving this is how high it went. Why did this happen?

Pictures below shows how it looked. the (red) line i drew indicates the gauge needle.

This is how low it was when it dropped and also when i idle sometimes.



This is how it is when i start the car it immediately goes here usually.



This is what i meant by high. Should i be worried?

[davew7]

My first guess is an electrical issue.
Your oil pressure sensor is located right under your distributor. Clean and tighten the electrical connection.
Odds are a lot lower that it is a pressure relief valve. Dave W

[Swooki]

My first guess is an electrical issue.
Your oil pressure sensor is located right under your distributor. Clean and tighten the electrical connection.
Odds are a lot lower that it is a pressure relief valve. Dave W

Sometimes still happens.

[davew7]

I would still bet that you have an electrical issue. You will have to trace the wiring and the plug connectors and look for a short or loose/bad connections, which will be a real PITA. If it was me, I would just run a new wire(s). I've spent hours tracking down a single bad connection pin that you could not see any corrosion on. If it would make you feel better you can remove the lower plug on the oil filter adaptor and clean the pressure by-pass valve just to be safe. But if you had real low pressure you would probably hear the engine rattling. Dave W

[SR85DET]

A lot of times the wiring itself is not so great underneath the insulation. I agree with it being an electrical issue and could be the instrument cluster. I am having the same issue with my temperature gauge. After all, the reading is based off resistance. Corrosion (creating high resistance) will throw off the reading. This could be the sensor, wiring (most likely) or cluster (possible, especially if not driven much and sitting outside).