Thread: Engine Rattle under load

Junkyard manifold and crossover pipe? Either that or remove the loose bolt that won't tighten, get a smaller diameter bolt in there and put a nut on the other side and tighten it down. It would work for now. Might want to throw a lock washer in there as well so it doesn't vibrate loose again.

Thanks! Would you say that's the likely culprit for the horsepower loss, or would that be fuel related (seems to pulse like the idle)?