Strange Rattle Under Load, 1994 4.0L OHV
Ever since I got my truck last year, it's had a weird rapid popping/rattling noise that occurs frequently somewhere in the lower front, but under specific conditions. If I rev up and down in park I don't hear it, but if I'm on the road and accelerate modestly it's noticeable, and goes away some if I accelerate harder or disappears completely if I let off. I'm assuming it's not a bearing or timing chain, since it only does it under load and doesn't sound rhythmic.
I'm thinking maybe a bad catalytic converter? (My mpg seems a bit low and the idle has always been uneven)
Last edited by make_a_splash; 10-25-2018 at 03:47 PM.
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