Vw polo 2007 has a problem starting iv chnged airflow sensor,the air filter bt nothing.ull start the car it will idle for a second then off it goes even with ur foot flat on the gas peddle it goes off

Rough Idling usually means tune up. New spark plug, n wires. After that i would check the maf sensor.

u need a computer diagnostic and not at a parts store-there selling items by bad codes -too general

Did you clean throttle body?can you bring up rpm?

Although it could be any number of things you may want to start with the air filter, a dirty air filter restricts the airflow to the engine and can cause exactly what you have described.

3 other suspects could be, Idle air control valve, mass airflow sensor, or throttle position sensor.

im also havin a problm with 99 polo 1.6 it revs high low high low and if da tank is below 1/4 it dies of while driving iv changed tank unit,trottle body, sensor nd after i changd tank unit da foat reads opsite way sum1 plz help me

100% sure it shows one of your cylinder compression is weak, please do a compression test to isolate the problem and get the head/pistons checked . This is a known problem with VW/Skoda 1.2 3 cylinder mills..

This sounds like a normal condition.What happens is the cold start emission reduction component monitor(software program in the computer) is running.
Cold Start Emission Reduction Component Monitor
The Cold Start Emission Reduction Component Monitor was introduced for the 2006 MY on vehicles that meet the
LEV-II emission standards. The monitor works by validating the operation of the components of the system
required to achieve the cold start emission reduction strategy, namely retarded spark timing and elevated idle
airflow.
When the CSER strategy is enabled, the idle air control system will request a higher idle rpm, elevating engine
airflow. While this CSER elevated airflow is requested, the low airflow test compares the measured idle airflow from
the MAF sensor to the commanded idle airflow from the idle air control strategy.

Hi, I have a 2001 polo 1.4 mpi it lackes power when you hit a hill it just dies, It has had new cat, fuel filter, fuel pump and throttle body, but is still the same it just dose not want to give me full rev's?

Bought a very reputable diy service manual for the vehicle, and that plus a bit of thought and nous gave me the cure: no intrinsic problem other than loose relay connections. Went round with the wiring diagrams as guide checking all electrical connections in tight and relays fuses etc all good. Switched on and no problem any more.

By the way, vehicle is 1992 VW Polo - not Fox (which in UK is a variant of the Polo)

Hello, VW polos 1.0, 1.4. 1.6, suffer from carbon bulid up in the throttle bodys causing bad idling, esp the Bosch Mono-Motronic (Throttle Body Injection systems), a good clean with carb cleaner should repair the problem, also engine temp sensor replacement and idle speed control valve replacement can help idle problems.