Spark plug Posted March 18, 2017 Share Posted March 18, 2017 Cooling fan keeps kicking in then thick blue smoke comes from exhaust, I have changed the thermo sensor and relay switch for fan. I have had a combustion test done which was normal, injection unit checked and are fine. Car runs smooth with no loss f power Any ideas why the fan and black smoke are happening?? ( smoke comes and goes) no warning lights Quote Link to comment Share on other sites More sharing options...
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