i own a 91 BRG with 88,xxx miles on it and just the other day i noticed a noise coming from the throttle body. at around 2000 to 2500 rpms it makes a rattling noise. i took it off the engine last night to check it it and i found nothing. so i put it back on and the noise continues. so as a fellow miata lover, i could use the help. thanx guys!!!