Oil presure - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 10 (permalink) Old 04-19-2010, 07:55 PM Thread Starter
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Oil presure

I was sitting in my truck the other day, idiling, and my oil presure gauge dropped to nothing for a brief period.... It has done this 3-4x since then. I have also been noticing that when i start my truck in the morning it takes 15-20 secounds for the oil presure gauge to read anything. Could this be a bad oil pump or sending unit? Has anyone seem anything like this before? Thanks! Pat

99 2500, NV4500
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post #2 of 10 (permalink) Old 04-21-2010, 06:15 AM
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on the top of your oil filter there is a plug pull it out and put a mechanical gauge on it and check it like that sometimes my gauge glitches but when i check it manually its fine. never fully trust factory gauges i was told by dodge they vary about 10% so thats means ither just fine or death!! hope that helps.

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post #3 of 10 (permalink) Old 04-26-2010, 02:36 PM
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Here is a wild video...

I don't trust stock gauge anymore that a dump light...

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #4 of 10 (permalink) Old 05-02-2010, 05:31 AM
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Dont mean to hi jack but have you ever had a problem with your oil pressure dropping down to 0 after you flip the smoke switch?
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post #5 of 10 (permalink) Old 05-02-2010, 02:01 PM
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No... Unless you got your smoke switch mis-wired some how to either screw up the +5V signal or grounds...

Being the MAP and oil pressure share the same +5V and Grounds... Got error codes???


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116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #6 of 10 (permalink) Old 05-05-2010, 03:37 PM
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I may have it miss wired. Which wires are supposed to be wired to. I though I had it right but apparently I may not. Also could a grounding issue also be the cause of the problem?
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post #7 of 10 (permalink) Old 05-05-2010, 03:46 PM
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Quote:
Originally Posted by Carbur8tr View Post
I may have it miss wired. Which wires are supposed to be wired to. I though I had it right but apparently I may not. Also could a grounding issue also be the cause of the problem?
Nothing ever should be cut or wired on to the stock MAP sensor lead or codes and problems will result.

The only thing that should be change is the lead from your enhancement box.

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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post #8 of 10 (permalink) Old 05-06-2010, 04:19 AM
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Sorry, that sounded bad. Trust me I would never just randomly wire something. Honestly I think I have the right wires crimped I just think that the switch is grounding itself out which is causing a conflict and a code. However I have not had the switch on in a while so the code has obviously gone away.

Ill take a look at it when I get a chance. Kinda busy here lately.
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post #9 of 10 (permalink) Old 05-09-2010, 04:46 AM Thread Starter
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so i got the new autometer oil pressure gauge installed today! Truck is reading 50 psi at idel?!? too much??? Book says 30 at idel. I installed the guage in the port on the top of the filter. Had to extend the pressure sensor a bit to clear the heater lines.... Is 50psi too much? Is this the correct spot to install at perminett oil pressure gauge? NEVER trust your stock gauges!!!

thanks

Pat

99 2500, NV4500
4" to 5" pipe, custom made
Edge Comp
BHAF
Raptor 150
EGT, Fuel, Turbo, Oil pressure gauges
285x75x16 Destination MT's
2 stroke oil diet
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post #10 of 10 (permalink) Old 05-15-2010, 12:02 AM
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Quote:
Originally Posted by Cummings24v View Post
so i got the new autometer oil pressure gauge installed today! Truck is reading 50 psi at idel?!? too much??? Book says 30 at idel. I installed the guage in the port on the top of the filter. Had to extend the pressure sensor a bit to clear the heater lines.... Is 50psi too much? Is this the correct spot to install at perminett oil pressure gauge? NEVER trust your stock gauges!!!

thanks

Pat
No... The book listed pressure are the minimum pressures... higher pressure is good. About 80-90 PSI should be about MAX.

Michael Nelson - 2002 Dodge Cummins & 1996 Dodge Ram 5.9L Gasser
116K Miles On My VP44 - 4 Years of 2 Cycle Oil Diet! - Mixed at 128:1 Ratio - 25.3 MPG maxed out!
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