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post #1 of 3 Old 03-20-2008, 08:37 AM Thread Starter
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Alternator Question

Well I have been putting a lot of money into my truck lately, and on my list was a new alternator. My lights have been pulsing (brighter to dimmer over and over) and my batteries are new so I went and got one from NAPA. My alternator that I had was putting out too much voltage according to the test NAPA ran. After I put my new one on my lights quit pulsing and my truck seems to run better. I can understand the lights, but my truck seems to just overall run smoother. Could anyone tell my what has happened?

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post #2 of 3 Old 03-20-2008, 08:48 AM
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One would think surges in currents could affect the whole system, but I'm not an expert.....

So bumping this up for ya.

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post #3 of 3 Old 03-20-2008, 08:58 AM
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I had a 2000 7.3, same symptons, long story short, new alternator. Lights quit pulsing and my dad (who's been driving it since I got my new 05) swears its better all the way around. I was thinking maybe without the voltage surges the ecm was getting good, clean signals to adjust everything as its running. Could be total b.s., but thats the best guess I can come up
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