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Old 11-10-2014, 02:46 PM   #1
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Voltage surge killing half the electronics

I have been dealing with an issue for a couple months now. I had a couple things go wrong with may car all at the same time. My passenger side exhaust came loose from the header the same time my alternator grounded out and a couple of my coils went bad. After tightening things up and replacing the coils with Accel coils. Then replacing the 4 gauge wire that had grounded out, my nightmares had truly began. Once the Accels were installed, I was getting a terrible feedback from my speakers. My voltage meter on the cluster was shooting up just below the H then it would drop back to normal. The issue was bad enough it kills half the electronics in the car. Ford told me put the car back to stock. LOL, point of no return. Or take back the Accels and get MSD. So I did, and I'm still having the same problems. I replace the battery with the Optima 1000 cca, now the problem is bad enough that my amp for my stereo keeps going into protection mode. I sent my alternator back to PA Performance and my alternator is in perfect shape. Kevin at PA said he would go ahead and replace the voltage regulator in it but it tested fine. All my power and grounds have been upgraded to 4 gauge and have been triple checked. I have completely disconnected the stereo and the problem continues. This all started when my coils went out. Any Ideas? Kevin from PA was puzzled as well.
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Old 11-24-2014, 07:31 PM   #2
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So I got the alternator back from PA Performance. They did replace the voltage regulator even though nothing was wrong with it. Kevin from Pa said everything tested perfectly and everything was in good working order. I put the alternator back on and the problem continued. I then took the car to Ford. Turns out my alternator is putting out 16.5 volts and it is throwing the car into protection, killing half my electronics. They were either unwilling or unable to continue testing without a stock alternator on the car. I bought a used, stock alternator from a junk yard. I will be installing it tomorrow then retesting my voltage at that point but I really don't know what to expect. I'm pretty certain that the problem is the PCM from when my alternator grounded out. I have dumped so much money into trying to figure out this problem. If it is the PCM I will have to have my SCT handheld divorced from my currant PCM the married to the new one. Just to add to the cost of things.
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