Re: What is typically goes bad on the 2.5L engines
The only thing that "typically" appears to plague both the 4 and 6 banger is blow by. You can fill volumes on the AMC engines that appear to suffer from this crippling afliction.
So ...look at the air cleaner carefully and see if it's been "tended to" recently.
If it's too clean ....take if for a thorough test drive under lots of varied load conditons and then check it out after your run.