Hey guys, I am new on here so I hope you can help. I have an oil pressure problem at idle. It is up where it should be out on the road but when I let off it to stop it goes down to nothing and the light come on. Any ideas?

 

Engine oil viscosity problems due to inadequate oil cooling, or the bottom end is beginning to get loose.

 

Check your oil pressure with a mechanical gauge. Most likely its the oil pressure sensor.

I had the exact same symptoms as you. Bought a mechanical gauge, removed the old sensor and hooked the line for the gauge and havent looked back since. I bought a 50 ohm resistor from radio shack to keep my check engine light off.

Now I know exactly what my oil pressure is...no worries

 

Are your batteries old? I was having some weird electrical problems--I was running 10-year old Optima's--and when I checked the voltage one was only putting out 8 volts. After I changed them out the electrical problems went away.

 

Thanks guys, I found the problem to be the oil pressure sensor. I replaced it at a cost of about $18 and the cost of a $10 socket to make the change, so I got off easy this time!

 

FWIW, unless you got it from Cummins, there is a good chance it wont last long.

No biggie, now that you know you have good pressure, if it messes up, just get one from Cummins.

 

most likley the electric sendor, i run my idle at 400rpm and it holds great pressure. the manual says to use 10w30- the pervous owner ran $0.49 cent a quart havoline 10w30 for 200k without any issues.

 

The above sheet looks like it came from a gasoline engine.
I am 100% certain that Cummins recommends 15w40 oil except in below freezing weather.

 

I noticed that as well, the rest of the information looks accurate but the oil seal isn't for a cummins. Biggest give away is where it says "for gasoline engines".