hi there wonder if anyone can help. I have a fiat cinquecento m reg 899cc which has no spark on one cylinder, i tryed new leads and plugs, but no difference, if i swap over the coil leads ( small wires from ecu ) the problem swaps to other cylinder. someone told me it could be the ecu? i have found many ecu's at scapyards but dont have exactly the same numbers on them. have found one on ebay that is nearly the same. can anyone help please.