My engine revolution is uneven, fluctuates between 900-1000rpm when starting from a cold temperature. When its temperature is higher, maybe after driving around for sometimes, it starts and stalls. Also, when on idle, it vibrates. OBD-2 scanner returned MAP sensor and Throttle position sensor problem. I ve replaced the throttle position sensor but it still does that. I did not replace the MAP because I dont its location and becos I read that most times, the MAP malfunctions because the throttle is bad.
I will appreciate any help on the MAP location and any other help to solve this. Thanks
Please post the exact code numbers not code descriptions. That will make it a lot easier to help you.
August, 9, 2012 AT 1:48 PM
The codes from OBD-2 scanner are p0120 - Throttle position sensor, p0105 - MAP circuit malfunction, p0443 - Evaporative Emission control system purge control valve circuit. I ve taken the car to my mechanic who said the MAP sensor is ok. But it still does that. I need to add that the car surges forward when changing from Gear 1 to 2. Thanks
August, 10, 2012 AT 11:10 PM
So does your scan tool read live data?
August, 15, 2012 AT 1:36 PM
I am not sure. But I ll check it. What should I look for?
August, 15, 2012 AT 4:32 PM
See what the tps sensor reads while at idle?
August, 22, 2012 AT 12:27 PM
While at Idle, the tps read 0%, while I accelarated with the gear position in park, the tps still read 0%. Intake MAP showed 1kPA. Thanks