Started with my car doing fine and then the CEL turns on and it runs rough as hell... pulled codes and it was P300/301/303/305/306 all current. Shop checks fuel, drains line to test it, fuel is fine, get the plugs and coils changed, faults cleared... car running fine when i pick it up from the service shop.

On the 3rd start since I picked it up... CEL back on, pull codes P300 current P304 pending, car runs fine, except there is a very occasional strange feeling when I hit the gas - not predictable and not reproducible, but I surely acknowledged it as did my wife.

The only other new symptom is the garaged car has a very very small droplet of oil from the rear left, which did not exist before taking it to the shop.

Not really sure where to head next...

 

Misfire on cylinder 4.

 

Make sure all the coil connectors are "clicked" in and seated properly. The oil leak could be from worn spark plug tubes and seals if you have a 99-01 model. This could've been disturbed when doing the coil change.