Quote:
Originally Posted by 8up
Hey guys,
I also have a 4.0 liter ranger 1998 that keeps setting these lean codes, is this a fairly easy job, replacing the orings?
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Yeah, I did the o-ring replacement and it increased my m.p.g. to 22 hwy driving. I also had to adjust the back brakes, had a weak spring.
Have you had any issues with engine noise, such as lifter-push rod tapping? I took over a 1999 4.0L with 105,000 miles and it seems to have an oiling problem. I have had success with engine cleaners on a 1992 4.0L with poor oiling at 157,000 miles, but this 1999 4.0L seems to be harder to flush out.