Will not "idle-up" with breather connected--when disconnected will start,idle, will run up to 2000rpm then stall out--put in/on new fuel pump, new fuel pressure regulator, new fuel filter, new oxygene sensor,new rotor & cap---when breather is connected motor will start & only idel at 500rpm--increase throttle & motor stalls/dies--with breather unattached, motor will start and idel ---increase throttle & motor runs strong to 2000rpm then above that rpm--motor stalls--boogs down
Engine stall or RPM fluctuates
at idle.
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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