I would greatly appreciate any suggestions. Could this code be whats causing the misfire? These codes only showed after I did the water pump job, but I didn't really mess with the VVT, so what gives? I did notice that 1 of the o-rings on what I think is the OCV was torn when I had the valve cover off, but figured it must have been like that for a while without issues so I didn't replace. We recommend following the Mazda service interval of 60,000 miles.

This is a strong, long-lived belt that will survive hard use on the street or the track, and the same one we use on our own street and race engines. Bought this kit and installed it, no complaints yet. Quality Continental timing belt with new tensioner and idler pulleys. By that point one of the idlers in the ebay timing belt kit I had used was already wearing significantly and had thrown grease everywhere. Could it be that I damaged the coil packs somehow or didn't tighten the spark plugs enough? Plugs are fairly new by the way. I did a timing belt a couple years ago on my 90 Miata and had to take it apart for something else. Bought scanner, read codes and got P0010 ('a camshaft position actuator open bank 1') and P0300 (misfire). I couldn't notice any power loss or stuttering and the CEL went back to solid in about 5 seconds so I drove it about 2 miles home. Then redlined on the highway and the CEL started flashing. I drove the car for about 2 days just fine. Car started right up and ran smooth but it had a steady CEL. Just replaced the water pump, timing belt, all coolant hoses. For background car is a 2004 base with 65,000 miles.

Miata timing belt