03 A4 1.8t Quattro, 133,000 miles.

The car is idling rough, runs great when driving. Changes out plugs, rotated coil packs around and the same cylinders come up, #1 and #3 random missfire. Ran injector cleaner, good fuel, no luck.

Also the rpm surges randomly when I come to a stop.

Any thoughts would be great.

Thank you

Jason