Hi guys, recently for the past weeks i've been gettin random misfire codes on all cylinders. The car runs perfectly fine, so i tried swapping out coil packs, spark plugs, valve adjustment, and just swapped out the injectors.. car idles and runs much much better, like i recovered some lost hp, anyhow is there anything else i can do before pulling out the head ? thats the last thing i want to do. thanks in advance.


btw i also resetted the ecu after each job was done.

 

Compression test and leak-down test ?
What are the numbers if u have done both ?