Oct 23, 2014 · over the last few weeks i have noticed the oil pressure is running a little higher on my isx. Last week i lost the oil sender for the ecm so i really started watching the gauge. May 5, 2013 · usually i'll idle at 700 rpm and get around 0. 7 to 0. 8 gal/hr on idle fuel usage but sometimes after a long hard drive of doing 70 with 40k in the trailer it'll idle real low on pressure. Still 700 rpm but oil pressure is down to 24 and fuel usage is as low as 0. 3 gal/hr. May 16, 2014 · according to cummins minimum allowable oil pressure at idle at operating temperature is 15 psi.
Jan 27, 2012 · i have been scratching my head working on an isx. About every 2500miles the oil pressure goes down to about 20psi. Replace the oil filter and pressure pops back up.
