Re: STRANGE PROBLEM? anyone for a ride?
First u dont have to run premium because the car is not set up for it, it is set up for 87 stock in the computer but it is up to u but if i were u i would run 87.
When these engines are running right you may have a really hard time hearing or feeling that they are running at all. It sounds to me like you might have a little vacuum leak causing it to run rough. It could be that the IAC Idle air control valve is getting a little flaky.
You can also try cleaning the MAF mass air flow meter with electronic parts cleaner, cleaning the throttle body with Throttle Body Cleaner and checking to make sure that the air intake connections are tight. also if that does not work try using some seafoam in the engine that stuff works mad good, Good luck.