Friday, August 31, 2012

300ZX Oil Presser Sensor

A while back the presser switch on my 300ZX gave out and instead of getting a high priced new one i got an generic one. installed it and my dash gauge read between 0 and 30psi (normally 30-60 psi). still trying to get out of buying a new one I popped the old one apart and found that the wires inside where broken. also while I had it apart i took a few pictures that you might find help full.


also i noted that one of the leads was a 6 ohms and the other at 93.2 ohms while no presser was applied. I assume that the one lead would be for an idiot light but there is no connection for this wire on my car (93 Z32), maybe for other model? While at presser the idiot lead had no conductivity and the other lead read 2 ohms.

They probably got pulled/broken last time i replaced it when i was trying to trouble shoot it. It turned out the be that the oil pan was dented up into the oil pick up. Surprisingly the lack of oil did not hurt the bearings. I pulled the pan and checked the bearings myself which was really overkill and unnecessary.

Also I replaced the Bose head unit with an alpine and at first i had the outputs hooked up to the Bose amped speakers. The result was REALLY bad sound, everything was distorted and chopped. I hooked the pre-amp out puts to the to speakers and got better sound. The sound was not as full as it should have been and there was a bad pop every time i turned it on, changed tracks, or changed stations. I tried to hook an capacitor to the amp switch lead hoping the it would buffer the amps but this did not work. I finally added SLC-4 by Scosche and got great sound and no popping.

here is a link for more information.

http://www.twinturbo.net/nissan/300zx/tech/oilsensor/oilsensor.html

also Japan engines have the oil presser sensor in a different location but it can be moved and the old spot plugged.

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