Got a '96 Cherokee I6 with 114K miles, running synthetic oil and after a little while the oil pressure gauge jumps around from 40 to over 80. Sometimes it settles down, sometimes not. I've changed the oil filter and replaced the oil, nothing shows up on the magnetic plug. I've cleaned the contacts at the oil pressure sensor, didn't help. Any suggestions on what I should try next? Thanks.
--Rocky (rockylarochelle)spam(@)(gmail.com)