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SVTPerformance's Chain of Restaurants
Road Side Pub
'04 FocusSVT Flashing check engine light
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<blockquote data-quote="mrlrd1" data-source="post: 15868075" data-attributes="member: 94513"><p>Most likely cause is a failed ignition coil pack. Usually upon removal you will find a crack in the resin potting, but not always. You can test the coil with either a spark tester (a grounded plug) or by carefully removing each lead from the coil and listening/watching for the arc. Start at the coil and work your way down the secondary system with the spark tester to isolate the coil from the wires as the failed part.</p><p></p><p>Also remove the wires and inspect for oil in plug wells. If any oil is found replace the valve cover gasket and spark plugs.</p><p></p><p>As stated earlier the glowing cat is a result, and not a cause. A lean/rich condition from a failed vacuum line will NOT cause a glowing cat. It is glowing due to heat from the excess fuel from the misfire, not any type of lean condition.</p><p></p><p>Finally, if you have a quality scanner capable of Mode 6 data you can monitor the catalytic converter's efficiency in real time. This would be good to know as a glowing cat will result in catalyst efficiency failure or restriction.</p></blockquote><p></p>
[QUOTE="mrlrd1, post: 15868075, member: 94513"] Most likely cause is a failed ignition coil pack. Usually upon removal you will find a crack in the resin potting, but not always. You can test the coil with either a spark tester (a grounded plug) or by carefully removing each lead from the coil and listening/watching for the arc. Start at the coil and work your way down the secondary system with the spark tester to isolate the coil from the wires as the failed part. Also remove the wires and inspect for oil in plug wells. If any oil is found replace the valve cover gasket and spark plugs. As stated earlier the glowing cat is a result, and not a cause. A lean/rich condition from a failed vacuum line will NOT cause a glowing cat. It is glowing due to heat from the excess fuel from the misfire, not any type of lean condition. Finally, if you have a quality scanner capable of Mode 6 data you can monitor the catalytic converter's efficiency in real time. This would be good to know as a glowing cat will result in catalyst efficiency failure or restriction. [/QUOTE]
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'04 FocusSVT Flashing check engine light
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