My thought was more I have no idea on the miles on the injectors and I don't want to do the passenger side or one injector and then have to tear it apart and do more.When you have an injector leaking combustion gas, it usually takes out all the injectors on that side. It would seem that at a minimum you need all new injectors on the passenger side. If they have very many miles on them, then it would be wise to do all 8.
I just hope I am right on with the diagnosis I can't think of anything else it could be
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