I have a 99 grand cherokee laredo 4.7 and i noticed that the oil pressure went down to 20 when it was idling but when i was driving it the pressure was @ 40 or 50 so can anybody please tell me what could b goin wrong? All posts will b greatly appreciated, thanks.
Junior Member
RPM and oil pressure variation go hand in hand. oil temp will make a big difference also. 20 psi @ idle sounds good to me. my xj's 4.0 drops 10 psi at idle, from 30 to 20 that is, once the oil warms up after about 20min.
ok cool. thanks upritexj