Hi Greesha,
you can check the throttle position sensor. Disconnect it and check the resistance of it. Between pin 1 and 2 (of the potentiometer) 2 kiloohms, between pin 2 and 3 (or was it pin 1 and 3) there´s something between 1kohms up to 2.8 - 3kohms, depending on opening the throttle.
Check out the pins on corrosion and humidity.
Greets
