it's an SVT and it says on the gas guage to use premium fuel only. i also remember readin somwhere in the owners manual to use 91+ octane.
Could my idling problem be a vacuum leak? It doesnt seem to me like a vacuum leak becuase it doesnt happen all the time. Sometimes it drops to idle normally and other times it just falls to zero but when it does idle it idles beatifully. any suggestions on what to check for other than the IAC?
