ok when im driving and my motor is under a load i hear this chattering noise kinda sounds like my rockers or sum thing. but i dont know what it is. my dad and i replaced the timing chain and guides about 10k ago due to broken guides so it cant be that. My dad has been a mechanic for over 20+ years and he swears that the noise is spark knock from shitty gas but i think otherwise. anyone else had this problem ? any input on it would be great. i have 94k on it right now too its a 91