off idle grinding sound?
99 xj 4.0 with AC. Every time the rpms are around 800-1200 it makes like a grinding, vibrating sound. I thought it was the PS pump so I switched it out for an autozone one cause the bearing felt loose...wrong. replaced both idlers...wrong. checked U joint but I am certain it is rpm based. All the other pullies feel tight and don't make noise when I spin them. I can't for the life of me figure it out but it is driving me crazy. Belt tension feels good and everything looks to be right. Maybe my oil pump is dying? Great pressure though, always at least 60 lbs.....help?
Is it a grinding sound or squealing sound? I noticed that on mine the mechanical fan is hitting what i think is the A/C line(not sure since I don't feel like looking at it now). Could check that.
1997 XJ Sport
6.5" with 31's
Built to CRAWL
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