When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The druck gauge used to work perfectly. No issues at all. I had some work done on the ac - system recharged and some dryer piece behind the steering wheel needed to be replaced.
The gauge now just reads 0 all the time. When I start the car it goes from below 0 (resting) jumps a bit to 0 but never above. Drove the car for about an hour tonight and no bad symptoms at all. Drives exactly the same. No warning lights ect. Gauge just never moves. All other gauges work great.
1. Does this just sound like a gauge issue - nothing big to worry about
2. What's the best way to start and diagnose this. Attached are a couple pics of the sender unit (I think it's the unit).
From my understanding it's a sump system. So when I'm stopped and the car is warm my oil level gauge jumps up and reads in the middle which means oil level is good. When I start driving the oil level drops to red which to me means the oil has left and is circulating around the engine which then should make the druck gauge rise.
Am I correct in this? If so, it seems it would be a druck gauge / sender issue and not an actual oil circulation issue.
Matt,
The 911 has a huge oil tank separated from the engine sump. In fact, the engine does not really have a sump. The tank(and it’s dip stick) is fitted in the right rear fender, called a dry sump, like a race car or an old radial aircraft engine. Oil quantity is checked at normal operating temp, at idle speed, after idling for a minute or so(IIRC the book says ‘idle for two minutes’) This is the only time to check the oil level and also the only time the oil quantity gauge will be reading correct in an old Porsche.
Therefore the short answer is ‘yes and no’
Clean the oil pressure switch contact and read up on the oil quantity check and let us know what you find.
Regards
Chris
Okay do this
Ignition on
Disconnect spade connector on sender . Then touch it to ground while peering through back window
Gauge should go from zero to full deflection
F it does the sender is bad. If it doesn't its your gauge or wiring
Took the gauge out of the dash - pushed some wires in...started it up and 4 bars on startup. Nice!
So if this helps anyone else in the future as most posts are about the gauge being pegged to 5....
Symptoms:
1. Druck Press Gauge at resting position when car off
2. Turn ignition and gauge comes up the 0 mark and oil light is on
3. Start the car and the gauge doesn't move but oil light off and car is running fine
Solution:
1. Gauge wires in dash were lose / bad connection
07-17-2018, 10:12 PM
Druck Gauge at 0
