Hello AMI, in reality many are pounded with the VW Jetta and Golf A3 even I buy them by K they say they cannot leave them well, I fix them and sell them

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Well, first of all, the regulator is very rare k is damaged, the injectors only have a 4000 RAM as a case, if they are VW, nothing happens, your problem is in relay 30 or in the bulb of temp, and one more thing the spark plugs of more than one electrode are not good for those models (A3) are better the spark plugs of an electrode calibrated in 32 that can also do so. Those are the most common of no kedar, with the scanner check the values of MAF or MAP and replace. Good luck my friend.