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Hi i'm new to this forum so hope i've posted in right area. I've recently purchased a 1999 1.8 zafira it had the check engine light on when i got it and was misfiring. i replaced the ignition coil and secured the connector on no.3 injector. this made the engine run spot on and light went out i took it for mot last week and it failed on co emissions too high at 0.63 the hc was at about 70 too. i noticed the inlet manifold was full of black sludge when i took off the throtltle body so i stripped the manifold and cleaned out. after rebuild i took it for a good hard run to clear out the engine but still emissions stayed same. any ideas would be appreciated.
 
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