Hi, complete z and forum newbie here! Recently bought a 55 plate GT car with 59k and a backfire thru the intake manifold from cylinder no. 6. The engine runs without the misfire if the lead to no.6 is pulled. The coil pack appears to be ok, I have changed all the spark plugs and the fuel injector, checked the compression (which appeared higher than no. 4) and am now puzzled.
Has anyone experienced anything like this on a zed or offer any thoughts? Apart from "why did you buy it?"
Any help appreciated.