I just got my Acura tl first car teenager you know it goes.

260K Kms no lights whatsoever.

However, 3 weeks after the purchase, the engine light came P0303 (Cylinder 3 Misfire) I went to a shop that did compression of all cylinders which passed and tested the injectors which passed Which led them to change all Sparkplugs 6
The misfire was fixed for 3 days.

Another code appeared P0306 (Cylinder 6) Misfire then later driving with that code Cylinders: 1 4 3 5, and 6 were all misfiring which made the car undrivable at that point. I ordered a set of ignition coils which was logically the issue and replaced all 6

The car was drivable and it led up to today. I ran the car turned it off turned it back on Code is back this time with cylinders 3 and 5 misfiring. I'm sick of misfires and need help as to what to do can someone give me advice?

Want to fix the issues and then build the car

 

^
Check the shop receipt to see if they put in the correct Spark Plug (Izfr6K11) (Ngk).
9807B-5617W Genuine Acura Spark Plug (Izfr6K11) (Ngk) (acurapartswarehouse.com)

 

Get 6 new ignition coils they are old and probably oily.
Aftermarket will do if you cant afford OEM

Cylinder 1 and 4 are the worst.

1st Check for power to ignition coils if you still have misfire
still problem?
2nd Check spark plug spark without coils
3rd is probably your fuel injectors need cleaning.