MAP Sensor is Faulty and needs replacing. All the other suggestions are possible but the MAP Sensor is the Idle control for the Central Processing Unit, or CPU>.
LOW IDLE CAN BE CAUSED BY MANY THINGS.CLOGGED AIR FILTER. LOW COMPRESSION OR MISFIRE CONDITION.IDLE AIR INLET PASSAGE OR THROTTLE BORE IS DIRTY OR FULL OF DEPOSITS.IDLE AIR CONTROL VALVE FAILED.MASS AIR FLOW SENSOR COULD BE OUT OF CALIBRATION. THROTTLE PLATE THROTTLE SHAFT OR LINKAGE IS DAMAGED OR STICKING.PROBABLY HAVE REMOVE THROTTLE BODY ASSEMBLY REMOVE IDLE AIR CONTROL VALVE AND THROTTLE POSITION SENSOR.BUY CAN OF CARBURETOR OR THROTTLE BODY CLEANER SPRAY CLEAN ALL CARBON BUILT UP AROUND THROTTLE PLATES AND BORE.LET AIR DRY BUY A NEW THROTTLE BODY GASKET.
MAP, or Manifold Absolute Pressure Sensor can depends on the usable voltage signal from other air quality/volume sensors on the engine and if it is Faulty, itself, (the MAP Sensor) it also sends its own signal of trouble to the other sensors in a faulty manner through the PCM's ECM, or engine control module, causing the engine to limp or adjust while 'Setting a Code' to the Check Engine Soon or MIL (Malfunction Indicator Lamp) if the cause of poor idle or polluted exhaust from the catalytic converter (O2 Sensor) can not be smoothed out by the Engine Control Module. This signals and allows a Code Reader to be attached to your vehicle through a digital ling under the dash which pinpoints any of the Systems and Sensors responsible for the 'TROUBLEMAKING'
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Hello
The engine
and transmission in this cars drive train are fully
electronically controlled by a computer called the PCM (Power Train
Control Module). Whenever a problem like this occurs the computer
stores a record of the problem (there are of course some exceptions
to this, like the fuel pump for instance) in the form of a fault code
in its memory, to read these fault codes you must have the systems
memory scanned with a special tool. Once the fault code(s) are read
you then must perform the appropriate diagnostic testing to find and
resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL THE
DIAGNOSIS & TESTING IS COMPLETED.
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