I have a 1989 honda civic lx when warm up to running temp and I make a stop the idle drops down and the car stops running any ideas,also having a problem choosing what kind of spark plugs to use in it?

. Install NGK spark plugs--the exact ones specified for the car.
. Replace Ignition Control Module and coil.
. Adjust idle rpm higher (throttle cable), if necessary.
. Clean Idle Air Control Valve and throttle body. Ensure upper and lower ports are clean.