Unknownmanxman Posted December 14, 2016 Share Posted December 14, 2016 (edited) Hi folks Got a problem with my 2003 D2 v8 (top hat liners) that I can't quite figure out. When I start the engine from cold it misfires, not badly but enough that you notice. It clears when the motor gets warm. I plugged the laptop into it, and it says that cylinders 3,5&7 have a misfire - no other errors. The plugs looked fine, but I put three new ones in anyway - still misfires when cold. The motor had a new genuine MAF earlier in the year and had magnecore plug leads a couple of years ago. Do do you guys have any ideas? I'm stuck on this one. Thanks jon Edited December 14, 2016 by Unknownmanxman Quote Link to comment Share on other sites More sharing options...
BogMonster Posted December 14, 2016 Share Posted December 14, 2016 I'd do a compression test for starters. Quote Link to comment Share on other sites More sharing options...
elbekko Posted December 15, 2016 Share Posted December 15, 2016 Is the ECU reporting a realistic temperature? Quote Link to comment Share on other sites More sharing options...
Unknownmanxman Posted December 16, 2016 Author Share Posted December 16, 2016 Hello again guys. Yeah they ecu temperature seems about right. the temperature that the MAF reads seems about right too. I notice that even though the engine is stopped, the MAF still reads a air flow of 5.6 g/s. Would a misfire go away when the engine is warm with low compression? Any other ideas? Quote Link to comment Share on other sites More sharing options...
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