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Indeed

Primes everything before start up maybe, tuna suggested it. I also cleaned my throttle body and maf sensor before thinking that was the issue, but just yesterday morning I went to leave and just started it and got the code. Im using step colder plugs too might switch back to stock range like...

I was getting the p0300 code as well at start up on cold starts. One thing that helped me was to turn car to "on" for like 15 seconds before starting up.

Going to be installing CS seals this weekend. When cleaning the injectors with green scothbrite pad would it be ok to use non-chlorine brake cleaner as well? any tips for install would be awesome!