neofreak

The last three FC's I've had had dead oil pressure gauges, one of which worked fine and just stopped after a while, is it the gauge cluster itself or a sensor or some sort? Is this a common issue?

vaughnc

it's the temperature sendor. This was discussed last week, so do a search for "gauge" or "temperature" and you should see it

neofreak

I would if the search worked.

vaughnc

DOH!!!!

I'm not sure what page it's on right now.

silverrotor

iTrader: (1)

I have seen It many times to be the Oil Sender Unit but Icemark suggests It to be the Thermo Valve within the Oil Cooler. Take you pic.

Icemark

No, the only time it is thermo valve is when there is low pressure, rather than no pressure.

No pressure I would be saying bad sender.

Low pressure, I would be saying E-shaft thermo valve

Normal or a little low pressure, dropping with RPM, I would say leaking front o-ring

neofreak

Just a gauge that shows nothing, and points below 0, still sender?

dr0x

Mine does this too (but my car has a blown motor), not sure if its just not building oil pressure because of that or what. Another thing to tackle when the new motor gets here.

silverrotor

iTrader: (1)

After confirming a clean connection at the Sender Unit, yea likely It. Unless the contacts at the back of the Cluster need attention.

Wankel7

Just turn on the igntion. Put a friend in the drivers seat. Then ground the connector that runs to the pressure sending unit. Ground breifly. your friends should notice the gauge peg. If it pegs your cluster.....is not....clustered

It would probally be the sending unit.

James

Kim

JUMPING IN Talking of oil-pressure senders, what size thread do they have, i have an s4 n/a and cant seem to find anything to guide in the right direction.

Wankel7

Do you mean you are having a hard time getting the pressure sensor back in the block?

James

Kim

No what i mean (excuse my english) is what size thread is it B/C ive bought an aftermarket gauge that have 1/8 inch thread, and i cant search the forum for info on wheter ill need an adapter...Kim

Juan

iTrader: (28)

What if the oil pressure gauge goes all the way to the top at idle? Bad gauge? Bad sending unit?

Wankel7

Well, if your gauge pegs it would lead me to believe your sensor wire is grounding out somewhere. That sounds like fun. If you cant find the short might just need to run a new wire.

James

Juan

iTrader: (28)

Thanks. I'll look for a bad wire coming from the sender. Maybe the sender wire is messed up.

Kim

ANYBODY!!! What is the thread-size for the OPG sender. PLEASE

Kim

BUMP