3rd Gen High Performance and Accessories (5.9L Only) Talk about Dodge/Cummins aftermarket products for third generation trucks here. Can include high-performance mods, or general accessories. THIS IS FOR THE 5.9L ONLY!

One more guage, which one?

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Old 08-05-2007, 02:11 PM
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Originally Posted by jrussell
There is an "oil pressure switch" in the block according to the service manual. The signal is just carried through the ECM and averaged/calculated. It's still going to read "0" if you have no oil pressure, so it's not like the factory gauge is useless.


The last oil pressure readings I saw on a couple of gassers read 35 lbs and then immediately drop to 0! The light will only come on below 7 psi. Thats the breaking point from 35 on the guage to the light coming on and showing 0 on the guage. So in my opinion the factory guage IS absolutley useless! That is unless you are not concerned as long as your oil pressure is above 7psi ?! I tend to want an accurate reading on crucial information such as oil pressure, but that's just me!
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