alapoikela

My oil gauge is jumping up and down between 2,5 - 4,5 is that normal?

Like its never stable for a long period.

5CHN3LL

If it's jumping around with no change in RPM, no, that's not normal. Could be the sender.

https://rennlist.com/forums/996-foru...ement-diy.html

dporto

Like this?

sasilverbullet

Same thing happened to me a few months back, sending unit was the culprit. Not expensive, and not that hard to replace.

wildbilly32

Yep on the sender. Don't wait until it goes to zero, sounds the warning then jumps back up to normal. That will cost you the price of one pair of replacement underwear! Don't ask me how I know...

alapoikela

As the car is it in her winter-rest I can’t test if it’s moving without any rpm

but I’m pretty sure the oilpreassure gauge doesn’t move without rpm.
only when i press the gas pedal and accelerate

but its more like pendling between 2,5-4 fast and a lot when I accelerate and deaccelerate.

5CHN3LL

My 996 oil pressure is far more sensitive to engine speed than my Corvette - but it's hard to guess whether what you're describing is normal.

Consider posting a video the next time you have access to the car...

DBJoe996

I am thinking first...the oil pressure sender. Second, a sticky oil pressure relief valve. There is a reason they modified it to have the rounded end. Also, last oil change and filter change? Did you do it or did someone else...thinking a floating bypass valve in the stock canister.

wildbilly32

That would NOT be good at all.

5CHN3LL

I hear those filter canister valves can pop out unexpectedly during oil changes...I should search for related threads.

yaknart33

My car has done this and I found the connection at oil sender was oxydized causing erratic operation of guage.There were no abnormal engine noises and it happened suddenly.I cleaned the connection and been working good.

pauldvazquez

Exactly the same thing with my car. A little contact cleaner, a little wire brushing....all good.

alapoikela

Update:

I cleaned the wire and connectors with contactspray, then the gauge wasnt jumping up and down. It went to full. But then sometimes it jumped down to 0. After a restart it went up to 5 again.

Ordered the oil sender unit and changed it (it was really tight and a pain in the ***, my hands looks like war).

Now its working perfect =)

Mike Mullins

It does take its toll on your hands getting in there, Can't imagine doing AOS w/o loosing a finger or stitches