10-10-2011, 12:39 PM
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Senior Club Cobra Member
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Join Date: Jun 2007
Location: Covington,
wa
Cobra Make, Engine: Superformance # 532, 466 BB, 560HP
Posts: 3,029
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Not Ranked
Had this happen to me a couple years ago, and I replaced the everything. By everything, I mean the cap, rotor, finally the complete distributer, plugs, wires, coil, MSD box, and it still ran the same.
I was ready to load it on a tow truck and have someone fix it and call me when it was done.
I was talking to an old friend of mine and he mentioned that the MSD unit is very sensitive to voltage input. He suggested that I disconnect the alternator and try it. I did and it ran fine. Put a new alternator on it and it did the same thing. Come to find out it was the voltage regulator. Replace it and it ran fine.
I did however end up with great collection of spare parts.
Take the belt off of the alternator and see how it runs.
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John Hall
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