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Loud engine knock could this be the EGR valve or the PCV valve causing the knock?\
1996 ISUZU TROOPER
Knocking all the time on start up
have the same problem?
Tuesday, April 24th, 2012 AT 5:20 AM
You mean it runs rough or just makes knocking noise? I bad miss can make a knocking sound or some part internally has failed. Hard to judge on net. Does it knock worse when driven?
Tuesday, April 24th, 2012 AT 5:45 AM
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