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Discussion Starter · #1 ·
Just had a new set fitted yesterday on the 9000 Aero. Car has done 8000 miles and one trackday since they were last changed. It has made a real difference to the performance of my stage 3'd car.

Perhaps one of the old plugs was not working properly, but if it is simply a case of their life being shortened due to the extra power, make sure you change plugs more regularly than service intervals suggest - for engines with raised boost, that is.
 

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Just changed my plugs oil and filter,I had a problem when the car would hesitate abruptly.It isnt apparent any more but am going to do the DI overhaul anyway as there are quite a few deposits,I hope this will sort it out
the plugs were a nice grey brown colour which means the engine is healthy.The oil was a bit black though
 

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Discussion Starter · #3 ·
Hmm, just drove the car again and it is not as quick. Was the extra
the ecu adapting to new plugs, or doesn't it work like that?
 
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