my e30 m40 need help!

[chili e30]

my car when move it will idle by itself until 2000 or 2500 rpm & jerk or die off.so far already check fuel pump,check ecu & this two thing no problem.change plug,change plug cable,fuel pump relay,distrubutor rotor,tempreature sensor,distrubutor cap,i.c.v,throtle body but still the same.really don't know what things else will cause this happen so really need help from sifu.

 

[berserkdroid]

Is your RPM stable ie NOT going up and down all the time? Any misfiring? Have you checked if all the hoses are tightly secured?

 

[chili e30]

when start the rpm is stable after move it will jerk then when you put back to N it will idle by itself till 2500 rpm or when u put on gear it die off.yes,misfiring.all the hoses is tightly secured.

 

[berserkdroid]

Did this problem happen gradually or suddenly? How is your Air Flow Meter?

 

[chili e30]

this thing happen after i change fuel pump relay,tempreature sensor,ditrubutor cap,distrubutor rotor,plug,plug cable.airflow change brand new 1 year ago.