98 polo 1.0 ltr starting and running probs

[meganall]

hoping you guys might be able to help
sometimes if i catch it right the car will start no probs but most of the time it just spins over then with full throttle it eventually starts, tried doing the throttle body reset by holding it down etc but doesnt work also as soon as i drive the revs increase to 2k and takes ages to return to idle
also if i pump the brake a few times on idle the revs increase to around 1600-1800 then drop back down
the cars only done 59k and had a full service not long ago inc plugs the double electrode ones

[Doctle Odd]

First of all check the timing. Check your crank sensor, knock sensor, temperature sensor and idle sensor. If you google them you will find information on how to check them with a multimeter

[meganall]

im putting my money on the coolant sensor, im getting one on thursday car runs fine apart from that and is surprisingly nippy for what it is do these cars suffer from the servo breaking down as its very low millage and vac pipes are fine ?

[Doctle Odd]

Theyre great little cars. Test the servo by pumping the pedal with the engine off. When it goes hard start the car with your foot pressing the brake, the pedal should drop 10-15 mil, if it doesn't suspect the servo

[meganall]

replaced the coolant sensor and all is hunky dory wouldnt think a £4:50 part would cause so many issues