Ok, so I have an 89 vert. Engine runs great, but the tranny is a piece. It's an auto (puke). Anyways, that's a different issue. The main topic of this post is my oil pressure gauge. You see, on occasion, it likes to show no pressure. 0. Nil.

Anyways, I don't get an oil light, and I noticed it while driving home, and the car wasn't running strange, no weird noises, no increasing temp, nothing to indicate that there was a lack of oil pressure, other than the gauge glaring at me, making me feel ever-so-uncomfortable.

Here's the fun part. I checked levels, and they're fine. Occasionally, the gauge will read fine, between 30psi and 60psi. At stoplights, however, it tends to drop to 30, and sometimes below just a bit.

Is my oil pump bad? Or is the sick vibration from my auto-tranny (It needs rebuilt and vibrates something awful) causing a loose connection on the sender unit? Where is the oil pressure sender?

Anyways, thanks in advance for your help. Have a fine day.

-setH

 

Clean the connection on the sending unit. It's on the right side of the motor, that may help. Those gauges are notoriosly bad though, so i wouldnt worry.

 

Thanks for the help guys, it gives me a bit more confidence that I can keep driving.

Just to clear this up... a rotary engine will still start acting weird when you lose oil pressure right? I know all about piston engines (specifically mitsubishi's 6g72), but rotaries are new to me.

Thanks again.

 

It is normal to drop down to around 30 at idle.
Attached is a picture of the oil pressure sender unit, clean up the contacts and make sure it's attached securely, mine has fell off before.

 

its the sender i have bought a auto meter oil pressure gauge because everytime i started the car my oil gauge would go to the top so i just changed the gauge so my new gauge started going crazy so i just put in the new sender works great

 

Well if you lose all oil pressure, as in it's not pumping, then you're pretty fucked.

 

are you that vibration you are talking about is not a bad u-joint in the driveshaft.

 

Well yeah, I know, but is it a noticeable problem at first? I mean, piston engines will start pinging, what will rotaries do?

[QUOTE=rotariesrule]are you that vibration you are talking about is not a bad u-joint in the driveshaft.QUOTE]

I would think that, but it only vibrates at idle, if I'm at speed, it's smooth as can be.