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Hi,

Out of the blue my R33 GTST has started missing badly on warm up. Once the car has reaches normal operating temp (around 10 mins of driving) it runs ok.

I have tried the coil test and I dont think it is the coils. The car also had a 100k service only 5k ago so the spark plugs and timing belt are new etc.

It did notice some black smoke today when I was on boost which I have never seen before.

The car was running perfectly until Sunday afternoon when this all started and it still runs great once warm however hen its cold it almost undrivable.

Could this be a faulty O2 sensor?

Any help would be appriciated.

Thanks

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