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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
Yes but that wouldn't help if you still have an over heating problem. To correct the problem, you need to replace your VW OEM plastic impeller water pump to an aftermarket metal impeller water pump. Plastic cracks at the shaft which the pulley drives and spins slower than engine speed or not at all. It's also a good time to do a timing belt service when you do this because it has to be removed out of the way to get to the pump.
try cleaning your battery terminals and tightening them. if that doesnt solve the problem your battery or alternator may be dying, some auto parts stores will do a charging system check for free that will tell you if one or the other is bad.
Has the car been serviced recently?
If not I would suggest getting it done.Not sure if you have diesel or petrol, but oil can thicken causing more load on the motor and airfilters get blocked and can cause a rich fuel mixture.
If petrol you can take out the plugs to check if they are a light brown colour, if very dark or black you need to check and adjust carb/injection settings/filter.Need to know what engine it is really.
have you isolated which cylinder is misfiring?
either way I would have a compression test done .. to find out which cyl is not firing pull 1 spark plug lead off at a time until you get the one that makes no difference
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.