It's one of three things. Either:
1) Too much air/too little fuel,
2) Too much fuel/too little air, or
3) An ignition problem.
I'm trying to get you to help me rule some things out. Did you do what I asked you to? What happened?
Do you have an EFI fuel pressure tester? DMM? Compression gauge?
Help me help you.
Take care,
ÅChris
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