UK-POLOS.NET - THE VW Polo Forum

Hi all,

My sister wanted to show all us boys she knows wots wot when it comes to buyin cars...so she bought a Polo R reg i fink 1998. It is reving around 2k mark when idel...i told her to get the ECU reset she said her machanic told her to buy a new ECU £150! (after resetting it twice and still having the high revz)

The high reves can be caused by other thigs aswel cant they...i.e throtle body?! Im no expert but i have never herd of anyone buying a new ECU if the engine is working fine other then the high revzz!?

HELP

could be anything, dont take it to vw, take it to a few garages for advice, get a collective view, and the most common they all suggest start with that, running problems can be seriously f*****g anything from a grain of sand in an injector sucked up from the bottom of ur petrol tank, to a small animal in your back box lol sorry, couldnt help unless i was thier to av a look

"couldnt help unless i was thier to av a look" Cornwall is not that far lol! thanx i apreciate it alot. The garage that told her to buy a new ECU did try resetting it twice ( i was told by her) but i was not there so i dont know if they acctully did! ill try and have a look this weekend if i have time.Thanx

the DIY place to start is the ecu reset, and then it's a really simple job to undo the air filter housing, and clean up the throttle body with carb cleaner (halfords do it)

sounds silly, but once upon a time my throttle cable got stuck because I put my aftermarket filter on slightly incorrectly - and it revved at 2k. would be worth checking the cable isn't stuck anywhere.

I agree yeah, clean up ya throttle body 1st. it is possible to reset the basic settings on the throttle body, just ask a vw garage to do that, as a second step. failing that u might be looking at a more indepth problem.
good luck

Oh dear... did she spend £150 on a new ecu?

When I first went to see my Polo and a previous Polo... they said it was idling at 2k cos it wasnt running regularly... but I asked for it to be reset before buying the car... so it couldnt have cost that much... cos they did it for me in the end.

thankyou everyone i was ment to go over and have a look but i dint get the chance. I will try and phone her and see whats the latest. I am not sure if she payed 150 for the ECU yet but thats what the garage was charging.
Regards

Right disconnect the Battery. Then take off the air box, give everything a good clean. And as someone said make sure the cable is not sticking.


Then put it all back and take the car for a nice long drive (about half hour should do).


If it still does it then, it could be loads of stuff. (even something like the temp sender witch is very common on the MK4).


Dave