vw polo 1.2 12v 2002 mk4 - rough start problem from a vw polo

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Mon 10 Dec 2012 13:07
vw polo 1.2 12v 2002 mk4 - rough start problem from a vw polo - cyleung

I bought a 2002 mk4 vw polo 1.2 12v, everytime ( cold or hot ) I start the engine, in the 1st 30 seconds, it revs itself up and down and dies out, I have to put my foot on gas to keep it running. But after about 30 seconds it runs normal. The engine faulty warning light keeps on all the time. I took the car to my local vw dealer, after spent £300 to replace the mapping sensor and cleaned the throttle body, it was as same as before, so they suggested that it should be ( 80% sure ) caused by the faulty throttle body housing ( costs £500 for the new part alone ). With no choice ( I couldn't afford other £600 to gamble ) I took the car back and replaced the throttle body housing by a 2nd hand unit (costs £55 ) but again it was the same. Can anyone help or suggest ?

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Mon 10 Dec 2012 18:21
vw polo 1.2 12v 2002 mk4 - rough start problem from a vw polo - elekie&a/c doctor

I would suggest you return to the VW dealer and ask them about modified timing chains and cylinder head issues and ecu software updates,and that is just for starters.hth

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Tue 11 Dec 2012 02:28
vw polo 1.2 12v 2002 mk4 - rough start problem from a vw polo - cyleung

I would suggest you return to the VW dealer and ask them about modified timing chains and cylinder head issues and ecu software updates,and that is just for starters.hth

Thanks for your suggestion, I would try.

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Wed 12 Dec 2012 23:20
vw polo 1.2 12v 2002 mk4 - rough start problem from a vw polo - Crasher

Find yourself an independent VW specialist and ask them to peg the crank and cams with the locking tools to see if the valve timing is correct, if it is have a compression test done. If that is OK the problem should be reality easy to track down for someone experienced with these engines.

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