Just had the plugs changed on my Panda, for a while now I had suspect it wasn't running right so took it to a local indie. He checked it with his expensive diagnostic equipment and no faults were showing. Lamda sensor values were all correct etc. He suspect the plugs should be changed.
I also had problems with damp, if I hadn't used it for a few days in damp weather the engine would run on three cylinders for the first few seconds so he put WD40 on the electrical connections including the plugs.
He changed the plugs and found one of them was burning out, it was all black near electrode. Since the car now has new plugs acceleration is noticeably faster and it sounds smoother at idle.
My car has done just 15,400 miles I thought they were supposed to last longer these days? Although the car is almost four years old so maybe it is the age that has killed them? Either way I will hopefully get the £30 back in better MPG :).
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