ok first off i dont kno wut my ignition timing is set at any more ..shop teacher out of town and timing gun is locked up.. but i think im having a detination problem..usualy while cruising around say on the highway, just barely on the gas to keep at one speed it sounds like a knock.. i thought it was an oil pressure problem but when i open the oil cap its shooting out so canceled that out.. could possibly be valve bent but it still runs pretty good..only thing i could think of would be detination.. it sounds like a valve would tap with no oil pressure, as soon as i give it gass it stops.. im only running like 86 octane gas and i had one bottle of octane boost in it.. about to go put some 92 octane and see if it helps any.. can you help me? does it sound like detination