weird oil pressure readings

[WStrong]

I have a '93 Cummins with well over 200,000 miles. I just changed the oil and now when I go down hills or through corners the oil pressure guage drops to zero and then slowly comes back up. The oil light never comes on but I'm nervous about driving it. Does anybody have any ideas? Thank you.

 

[hdm48]

I may get a rap in the mouth for this but, did you put all the oil in it? I t seems strange that it would start doing this right after an oil change. If it were me I would put a mechanical guage on it [there is a handy plug on top of the oil filter housing] and then drive it to see if it is really doing it.

 

[Paychk]

Or



How about the right amount of oil? it sounds like the symptoms of a low oil level.



I think it takes 13 quarts with a filter change, 12 without.

 

[expdyt]

WStrong, my guess is that you have a sender problem. The same symptoms showed up in my 92 a couple of years ago (don't understand what the downhill effect is), but I replaced the original, adding a tee for a mechanical gauge at the time. Been fine since then.

 

[Gary - K7GLD]

Carefully disconnect the oil sensor connector at the sensor on the driver's side of the block, give bothe the male and female sections a good liberal dousing of contact cleaner, then carefully and FULLY reconnect - that will usually fix the problem for a reasonably long period of time - a careful application of no-ox or similar conductivity improver is a definite plus as well...



Probably nothing really wrong with the motor, sensor of guage at all...