I've had my first WRX (02) for about 5 days now and on the way home from buying it I felt a kind of skipping feeling when I would be going down hills with the cruise control on. Didn't really think anything about it because I didn't feel it in any other situation. Now today I've been driving around (AC on again) and I'm feeling it randomly like once or twice every 5-10 minutes, the idle also feels very slightly more rough.
Is this just something that the WRX does when the AC is on, or is it maybe a spark plug/coil issue.
Background info: The car has 84100 miles, single owner, has only been driven about 5k miles in the past 2 years, I replaced the alternator belt yesterday. I have maintenance records from the previous owner and one of them says that it is recommended that the car gets a new fuel filter and fuel injector cleaner ran through it.