Our 2004 Boxster S 3.4 has on 3 occasions over the past couple of weeks acted up when starting from cold. It's sluggish to fire up and when it does it runs roughly with the engine shuddering. The CEL comes on and the last time it behaved like this it flashed, so quite alarming
However, we dared to try again after switching off and it fired up perfectly well, sounds as sweet as ever and subsequently drives as well as ever too. It's only done this at cold start up and does live outside so it is quite cold and damp.
After it did it again yesterday I took it to my friends workshop. His PIWIS told us it had misfired (on cyclinders 1,4,6) but there were no other faults such as sensors or coils, which along with plugs were all renewed a few months ago at its major service in any case. Thought about dodgy tank of petrol but it did this before and after it was filled it up.
All fault codes were cleared and I filled it up again just in case on the drive home, during which I gave it a spirited burst and it was good as gold. It also started and ran fine for my wife this morning, so we'll to run and observe.
When it does it again we'll get it back on the PIWIS and take a closer look, in the meantime if anybody has any ideas and/or has had something similiar it would be great to know :thumb:
However, we dared to try again after switching off and it fired up perfectly well, sounds as sweet as ever and subsequently drives as well as ever too. It's only done this at cold start up and does live outside so it is quite cold and damp.
After it did it again yesterday I took it to my friends workshop. His PIWIS told us it had misfired (on cyclinders 1,4,6) but there were no other faults such as sensors or coils, which along with plugs were all renewed a few months ago at its major service in any case. Thought about dodgy tank of petrol but it did this before and after it was filled it up.
All fault codes were cleared and I filled it up again just in case on the drive home, during which I gave it a spirited burst and it was good as gold. It also started and ran fine for my wife this morning, so we'll to run and observe.
When it does it again we'll get it back on the PIWIS and take a closer look, in the meantime if anybody has any ideas and/or has had something similiar it would be great to know :thumb: