my tt 300 has recently started running fairly rich i also get bad fuel economy 350 or so of a tank its done 115000 i was wondering if its likly to be the o2 sensors? and if i should replace them? how hard are they to replace i looked in tech but couldnt find it any tips much apreciated
Some common reasons for running rich...>> - ECU temp sensor faulty or connector corroded - Detination Sensor faulty or wires broken - boost leaks - faulty O2 sensors Try starting with an ECU Diagnostic
