mazda misfires when cold?

[Lorenzo]

I have 1999 Mazda Protege lx and it misfires to the point where it wants to turn off. this only happens when the engine is cold for about 10 min.and when the engine is warm the misfire goes away.i have replace map sensor tps sensor temp sensor mass airflow sensor and spark plugs and injects all of them gas regulator i checked the gas pressure its fine. can some help. im runnin out of ideas of what the problem could be. thank you