Was your engine air filter really dirty?
Sometimes blowing the dirt out can create problems with the filter and could cause dirt particles to trash the mass airflow sensor after you put it all back together and run it.
Always just replace the filter instead of cleaning it, cause it can burn you.

Wanna have some fun?
Check your spark plugs and supressor ends out.
They, of course you probably know this,live under the black covers on the valve covers.
Be careful not to break anything.
Each coil has 2-5mm allen head bolts holding them down.
Pull the bolts, and pull the coils up and check out the supressor ends for cracks or white marks or water evidence.
I found mud in some before from flood cars that survived(barely).
Note: I always blow compressed air into the spark plug holes to blow out any debris before I remove the spark plugs, that way it won't fall into the hole when the plug is removed.
See how the plugs look.
Be gentle on flexing the wiring harness conneceted to the coils.
Carefule with the black purge valve line (driver side) hard plastic near front of drivers side valve cover.
Also the breather tube at rear of pass side valve cover may be like bubble gum,and or very hard and brittle.