hosrom_951

Well, first, i got the Koni Yellow Adjustable suspension. Was getting a funny ride as i mentioned in my previous topic. Now, after adjusting them to 50%, its SMOOTH finally got the suspension up right, but still need new tires though. Now for the oil pressure. Took out the gauges and cleaned the rear connectors, held the gauge in my hand and played with it, it got stuck sometimes while playing with it. Went under the car, check the wires for the sender, everything looks fine. STILL getting 2.0bar (and 2.2 on some occasions) when warm. remember, i used to get 3.0~3.5bar before i let my specialist change the oil, oil filter and clean ground connections. And im using the same grade of oil (Mobile 1 15w~50 Super Synthetic). But while driving yesterday afternoon, the gauge dropped to 0, no warning lights came on, tapped the cluster a couple of times, and it went back up. This morning, on my way to work, i pushed the car hard (red lining, hitting high speeds on the highway). Gave it neutral while going 60mph to see the gauge, STILL read 2.0bar After cooling it down, the gauge read 2.2bar (almost), so im pretty sure that it's an electrical problem, what do you guys say?

hosrom_951

Would someone please reply i REALLY need help with this

dme

Cleaning the grounds could cause you to see a lower reading on the oil pressure gauge. The gauge should show 1 Bar at 30 ohms resistance with the sender and 184 ohms at 5 Bar. Cleaning the grounds could have lowered the resistance the gauge was seeing and lowered the pressure reading to the actual value. This is just my theory so take it at its worth. I suppose to really find out, you would have to check the gauge reading while the car was running and then get underneath the engine, remove the wires from the sender, and take an actual resistance reading. It would probably make sense to set up some long leads on the senders before the test since that is a mighty warm area of the car. As far as the gauge going to zero, that sounds like a faulty connection in the cluster.

hosrom_951

The connector of the cluster? the three connectors behind the cluster? i cleaned them out, the gauge drops to 0 when the car is cold (after driving for 1 min then coming to a stop) RARELY it goes to 0 when driving (though happened a few times).

dme

This doesn't sound like a sender issue. Car should read at around 5 when cold and drop to 2 or 3 when warm. Is there a chance the bolt on the crank pully is loose? (Real low pressure) Also, strangely enough when there is high resistance at the sender you get high bar readings and low resistance at low bar readings, if it is electrical then perhaps the gauge is shorting somewhere in the cluster. Wish I could help more. I'm still playing catchup with my car. Been out of the Porsche ownership thing for awhile.

hosrom_951

Yes, in KNOW that there is a bad electrical thging going on. STill having it checked out, thnx for the help

hosrom_951

But im sure that it is not the bolk on the crankshaft, coz if it was, then it should read lower than 2bar after a hard drive correct?