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Bad tach causing a miss on an hp500 Carb engine

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Bad tach causing a miss on an hp500 Carb engine

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Old 10-03-2015 | 07:23 AM
  #11  
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The engines are 1999 model electronics/wiring. I do have the knock sensor setup. I pulled the cap yesterday and ran some fine sandpaper over the ignition sensor. After restarting it after this it seemed to idlena hair higher and smoother but this may have been a flook. The miss was still there. I'll check some more things out here when it gets light out and go from there.
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Old 10-03-2015 | 10:44 AM
  #12  
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Swapped coils and now it runs as smooth as a babies ass. I've never had a coil partially fail. It's always been all or nothing. Coil had a "98" on it which I can only assume was a year of manufacture, so I guess it shouldn't be a surprise that it was failing.
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Old 10-04-2015 | 02:50 PM
  #13  
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Thanks for the update. Posted what I did in post # 9 as I really thought your problem was ignition component related. Like I said cap, rotor, ignition sensor and coil basically have become maintenance items these days.
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Old 10-04-2015 | 03:25 PM
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It really sucks but thats what its come down to I guess.... Either way, a coil is alot cheaper than alot of things!
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