Originally Posted by
l-m tech
has a wix 57312 tall filter.the truck has went 500 miles sence i put a oil and egr cooler on it with no problems.how would a missing plug in the hpop cause base oil pressure to be low.wouldnt it set a low icp pressure code.fixin to take a vacation ,first one in 20 years,havnt done anything else yet.will get back to it after the new year.
I've been finding the aftermarket filters with the replacement caps built on have a problem with the bottoms of the filter warping, not letting the valve at the bottom of the housing close all the way. That creates a "leak", if you will, not letting oil pressure build completely. You see the lack of pressure at idle mostly. You still get enough oil to fire the injectors, but not enough to build oil pressure at the guage. Replacing the filter and cap with OEM solved these issues.