Dodge Ram 2500 Cummings Diesel Oil Pressure Gauge

Gary from Muleshoe · Mar 21, 2017

I am currently test driving a Ram 2500 Diesel and occasionally when I pull up to a stop light after running high speed the oil pressure gauge will drop to zero and check gauge light comes on. Tap the accelerator and it comes right up. I have been researching this on line and some say it is the sensor others say it is the gauge cluster. All say it is not the pump. What do you guys say on this?

Gary from Muleshoe · Mar 21, 2017

Forgot to mention it is 1998 with 147,000 miles on it.

16-30 oilpull · Mar 21, 2017

the sender on side of block went bad on mine a few years back. may be in that. probably not in the pump or it wouldn't come up that easy.

Case Nutty 1660 · Mar 21, 2017

Barley broken in,, easy way to test and be sure is screw a manual gauge in for a test, sounds to me like a bad sending unit

M w J · Mar 21, 2017

Is it full of oil? Maybe light oil. If it was a sudden stop the oil rushes to the end of the pan and the pump will suck air. Mine did it one time but it was a sudden stop and down to add on oil.

Steve@Advance · Mar 21, 2017

Gary, is this someone you know well enough to let you put a remote mechanical gauge on it?

That's the only real way to know for sure.

Sounds like either it is low on oil or the pick up tube is loose, sucking air when the oil sloshes forward.

Could also be an electrical problem, loose connection, bad ground, something affected by stopping inertia.

Gary from Muleshoe · Mar 21, 2017

Yes we have discussed it and he is willing to try things to fix it. It is full of oil. Doesn't always do it just occasionally.

Gary201 · Mar 21, 2017

(quoted from post at 03:04:15 03/21/17) I am currently test driving a Ram 2500 Diesel and occasionally when I pull up to a stop light after running high speed the oil pressure gauge will drop to zero and check gauge light comes on. Tap the accelerator and it comes right up. I have been researching this on line and some say it is the sensor others say it is the gauge cluster. All say it is not the pump. What do you guys say on this?

I have the same truck (1998 2500) and had the same problem. I replaced the sensor without any change, then installed a manual gauge. I used a brass street tee at the block and reinstalled the original sensor as well. No more problems! My theory- the sensor is to close to the block and overheats, moving it approximately 1" away solved the problem.

dcarp · Mar 21, 2017

As said by others, put in a real gauge. The setup on those early Dodges is a gauge just for looks. They are not accurate and represent, not measure, oil pressure. In other words, the factory gauge is just for looks. To accurately measure the oil pressure you will need a real gauge.

47fivewindow · Mar 21, 2017

my 2002 did exactly that. The sensor was bad.

Dodge Ram 2500 Cummings Diesel Oil Pressure Gauge

Gary from Muleshoe

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Gary from Muleshoe

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16-30 oilpull

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Case Nutty 1660

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M w J

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Steve@Advance

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Gary from Muleshoe

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Gary201

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dcarp

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47fivewindow

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