Hey Y'all. Just bought a 99 Outback 30th anniversary special this week-my second Outback. It's a total cream puff-the leather is nearly flawless, everything is in great condition. I'm having a little problem with hesitation. It stumbles just for a second at accelerating off idle. Does it hot and cold, but runs smoothly at all other times with no indication of misfiring. I'm still new to Subarus and diagnosing their particular quirks. I'd appreciate anyone's input for what to look for. I'm going to check out ignition components and vacuum lines tomorrow.

Thanks

Be sure to check over all of the PCV and breather hoses as well.

New air and fuel filters are always in order with a new car.

Replace the PCV valve if its old. New from Subaru is the best way to go.

 

Clean the MAF sensor, run half a bottle of Seafoam in the intake, put the other half in the fuel tank to help clean the injectors. Or get a bottle of Lucas fuel system cleaner. (Tune-up In a Bottle)

 

Spark plugs would be next after Seafoam.

Sorry I didn't see your post earlier! Got most of these items done, couple more to do. Thanks for your help!