Pre-ignition problem fix
Last two months i had "pre-ignition" noises from the engine. I dont know the exact english word for it,
its the noise that comes when the ignition fires the sparks a bit sooner than supposed and it appears at uphill roads at low rpms.
The ignition timing was adjustable at older cars, now its controlled electronically and the problem appears most cases from bad fuel.
Well i refueled six or seven times from diferent gas stations and the poblem didnt go away. Thus i went to the dealer. Here is the fix:
The variable timing valve needs cleaning. They removed it, cleaned it with some chemicals and thats it..
They said neglecting cleaning this valve every 20.000 km might cause a variable timing system failure.
My car has 15.000 km, 1.6lt 120Hp. Have your ears wide-open guys wink