Driving the wifes 1.6 G4FC FD i have noticed the engine seems to rattle or knock under load a lot more recently. I changed the steering bush a couple of weeks back and i believe it has been worse since that was changed, the only thing i can think of is perhaps disconnecting the battery has reset the ECU and changed some of the fueling and timing it had previously. It would knock occationally before that under high load, but kick it down from 4 to 3 in the auto would fix it, now it is knocking even after dropping back to 3rd.
She runs the car on 91 petrol, i was told this was fine but correct me if i am wrong. I don't know with the modern individual coil engines if there is anyway to make it change the timing to try and correct the noise? Spark plugs were replaced at the last service about 8000km ago.
Anyone got any ideas?