SHELBY GT-40 ULTIMATE Member
Joined: Feb 2007
If the oil isn't low, then it's either gas or coolant making the smoke.
What's the oil pressure like? It can be full of oil but if it's not being pumped then it'll knock.
Did it sound like rocks in a coffee can? That'd be detonation and it's usually caused by too much timing, too low of octane, or carbon deposits.
Is it a clank/clang that speeds up and slows down with the engine? That's probably a rod knocking and if it is, you better stop driving it because you could vent the block eventually. It also means a rebuild is in your future because it's beating a bearing to death.
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