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My engine is a fresh built 302 cammed, aluminum heads, for some reason it just randomly started making a weird sound out the exhaust, runs rough like needs new spark plugs I guess from breaking in, but the weird exhaust from it running rough and it smells hot when I park even after driving ou a short distance
 

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My engine is a fresh built 302 cammed, aluminum heads, for some reason it just randomly started making a weird sound out the exhaust, runs rough like needs new spark plugs I guess from breaking in, but the weird exhaust from it running rough and it smells hot when I park even after driving ou a short distance
Make sure you don't have a loose rocker arm, bent pushrod, etc..
Check your ignition timing and ensure you have good fuel pressure.
 
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