Hi all. Ive just bought a 2001 mk2 Fiat Punto. The engine management light was on as the engine was misfiring quite heavily. I found that the HT leads were bad causing them to short out against the engine. I replaced them, with new plugs. I also had the faults erased from the ECU. They were 'single or multiple misfire' The car runs much better now but when I accelerate it's like the car is holding back, and feels like there's still a misfire or something. Yesterday the engine management light came on again. I got 2 codes, P0115 and U1601 pd. The car is also idling a bit rough and high (1300rpm) If I hold the revs around 2000rpm the engine revs go up and down... Any ideas would be appreciated.
Thanks