Thank you for your help,
The problem was from an interrupted spark plug wire and dirt on its pipe. It
seems that somehow after getting warm the
fire start letting the ignition pulses to pass.
I need your help to figure out why my engine is sputtering for 15-20 minutes
when it is cold. It does start ok when cold
After that is just running ok without problems. The engine misses are random and
I can correlate them with a cylinder ,
have no timing but are felt more when I accelerate when shaking occur.
I changed the gas , air filters, spark plugs rotor cap but it did not help. Is
this an electrical problem or engine