Any logical reason that one HT lead shoud foul up at the ignition module ( didtributor in old money ) It happens to be the shortest and closest to the supply, and it was all connected OK.
Car's a 2.0L ECOTEC Cav
Ian
One crappy lead
Jun 14, 2006
4 Replies
Damp and poor connection. Poor quality lead.
Mondeo 2.0 Zetec had the same problem. The cylinder close to the DIS pack would have the lead break down, and cause a misfire.
Apparently the voltage is so high, that it finds it easier to arc to the block over the spark plug than jump a 1.3mm gap.
The solution was to close the gap to 1.0mm, and it was fine.
Pete.
A guess would be that if a resistive lead as most are being shorter it is carrying more current than the other ones.
there is also a difference in that the modern coils are double ended which gives one positive spark and one negative, this wears the plugs and leads differently.
mrcheerful
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