My urS6 has a horrible missfire until it reaches temperature. It sounds like its running on 4 sometimes 3 cylinders. I've changed coil packs to the 1.8t conversion, new plugs and it still does it. The vehicle is sorn at the moment and hasn't been run properly on the road for 2.5 yrs, only started and ticked over till hot.
When it was taken off the road it had this missfire but then i couldn't afford to sort it. Now I can and intend in doing so but its baffling me.
When I first start it from cold, for the first 30 seconds it runs fine but only if I don't touch the pedal. If I do touch the pedal it runs like a bag of *****! Nearly cutting out. It does this until its hot then it ticks over alot better but still coughs a bit when accelerated. After it dies down it then missfires for a few seconds then its ok.
As I said, I replaced the coil packs and have tried new plugs but its still the same.
When its ticking over and missfiring I can disconnect each fuel injector and I can hear each one make a difference to engine note so I don't 'think' its injector based.
Any help appreciated
When it was taken off the road it had this missfire but then i couldn't afford to sort it. Now I can and intend in doing so but its baffling me.
When I first start it from cold, for the first 30 seconds it runs fine but only if I don't touch the pedal. If I do touch the pedal it runs like a bag of *****! Nearly cutting out. It does this until its hot then it ticks over alot better but still coughs a bit when accelerated. After it dies down it then missfires for a few seconds then its ok.
As I said, I replaced the coil packs and have tried new plugs but its still the same.
When its ticking over and missfiring I can disconnect each fuel injector and I can hear each one make a difference to engine note so I don't 'think' its injector based.
Any help appreciated
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