Have a hotshot friend of mine broke down in indiana, truck was running great he came up to a stop let out of it from 65mph and it started making a loud popping noise through the intake? truck seems to be idleing fine but has lost all bottom end power and is making a loud (audiable in the background on crappy cell phones thumping noise coming back through the intake???
pushrod on exhaust valve come loose?
Most likely a bent valve. Have had 5 or 6 in the fleet do it now, not common but it does happen with 'em. Usually they'll idle really rough though, but one I had didn't idle too bad, but ran like doodoo.
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