James Alexander Posted February 20, 2020 Share Posted February 20, 2020 Planning on getting a sports cat for my focus st250 for its final bolt on mod in next couple of weeks but wont be able to afford remap till October time possibly xmas. I understand the eml light could come on but will it cause running issues as ECU tries to adjust fuelling due to codes???? Has anyone fitted sports cat without a map and ran fine? Quote Link to comment Share on other sites More sharing options...
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