I have a 98 Honda Passport when driving around 2500 to 3000 RPM's like getting up to speed it sounds like a tin can for the exhaust, but when its in park or neutral you can rev it up and sounds fine?
I has another question kind you like this but found when you put it in park and rev it up
doesnt make that noise.
Does your exhaust system have a "resonator" near the muffler ? Sounds like the resonator is shot (bad). If it were the muffler or catalytic converter it would happen all the time. Resonators work on a frequency pitch that vehicles don't get to sitting still and just "revving" the engine.
Im pretty sure it doesnt have a resonator on there, but the noise is really loud. To get up to speed you really dont want to give it any gas because it sounds bad.
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