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How often can a set go bad? Car runs fine on acceleration, but cruising seems like it misses every now and then. Could it be also that it has not been on the road in over a month?
 

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Hi Travis
It depends on a few things , one quality and two how much heat there subjected to. On my Dually they said to expect to replace them very often and at $130.00 dollars I will spend the time to heat sheild them so I can stretch that out some .
We use Taylor wire on most of our hot rods and they seem to last . They are not to pricey around $80.00 a set and Summit and Jegs may have them cheaper.
What type of ignition system are you using ?
 

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If your engine runs smooth under acceleration, but misses when cruising, I think I's suspect timing or fuel. Does it ping when you gas it? You may want to check your plugs as well. I had a similar problem running Accel plugs and went back to AC Delco. Also, if you don't have a fuel pressure regulator, you may consider installing one.
 
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