I am having the same problem with a 92 with the same engine except that I have lost HP. Have you lost HP? I don't know what it is, but I am thinking it has to do with the rocker assembly. The ticking keeps time with the rotation of the cam. I have not pulled off the valve cover to check this theory. Also I have gasoline in the oil. Check to see if this problem exists for you. We possibly have the same problem and could assist one another with any information we may find.
Monday, May 5th, 2008 AT 8:49 AM