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SVT Shelby GT500
Help with spark plugs and blowout!!!
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<blockquote data-quote="XP900" data-source="post: 16616272" data-attributes="member: 199546"><p>When I had issues I ordered a set of coils too - swapped them out to verify but they were not failing. My mileage was a lot lower but at 70K I wouldn't hesitate to order a set even as a test set.</p><p>Are you getting OBD misfire codes on cylinders?</p><p></p><p>I ran BR7EF gapped at 28 all the time and had to replace every 3-5K with a new set for misfires....common lifespan of those plugs in my 2010. I also ran the SP471 once or twice but never really liked them as much as the copper. They seemed to miss at idle. Never used Iridium due to all the negatives I read. My tuner asked why I was still using copper and wanted me to try iridiums for his tune. I installed and gapped at 30 -- TR7IX.</p><p></p><p>I haven't felt any misses or rough idles with over 7K on these plugs and my boost was 19 max (hopefully I brought it down a little with recent exhaust changes).</p><p></p><p>Try coils and then TR7IX at 30 if you can't resolve it.</p></blockquote><p></p>
[QUOTE="XP900, post: 16616272, member: 199546"] When I had issues I ordered a set of coils too - swapped them out to verify but they were not failing. My mileage was a lot lower but at 70K I wouldn't hesitate to order a set even as a test set. Are you getting OBD misfire codes on cylinders? I ran BR7EF gapped at 28 all the time and had to replace every 3-5K with a new set for misfires....common lifespan of those plugs in my 2010. I also ran the SP471 once or twice but never really liked them as much as the copper. They seemed to miss at idle. Never used Iridium due to all the negatives I read. My tuner asked why I was still using copper and wanted me to try iridiums for his tune. I installed and gapped at 30 -- TR7IX. I haven't felt any misses or rough idles with over 7K on these plugs and my boost was 19 max (hopefully I brought it down a little with recent exhaust changes). Try coils and then TR7IX at 30 if you can't resolve it. [/QUOTE]
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SVT Shelby GT500
Help with spark plugs and blowout!!!
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