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Old 01-31-2014, 01:42 PM
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alternator

just left oreillys. i have had slow starts lately with newer batteries. he tested and said bad alternator. only putting out 30 amps. i bought new one since i was there. does this sound right? it seems like i have looked around since being home and thats about right for idle. any thoughts?
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Old 01-31-2014, 06:57 PM
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If you had lights on and heater on high it should have been alot higher.mine was putting out 50 and I had slow starts with new Batteries.you're new alt.should be 110 amp.
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Old 02-01-2014, 05:00 AM
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even at idle. i didnt know to have anything on and i dont think he did either. i think just stereo was on.
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Old 02-01-2014, 05:55 AM
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It should higher than 30 for sure.I can't remember exact numbers but my batteries were only getting like 6 amps or so for recharging.so unless you drive for hours you're batteries never get fully recharged.if you have a amp probe you can check it yourself.
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Old 02-01-2014, 01:48 PM
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The amount of amperage that goes to the batteries depends on load (what's turned on) and how drained they to start with. Just because an alternator is capable of producing 110 amps doesn't mean that much will be required. If your alternator maintains the voltage between 13.5 to 14 volts when running then it is doing all that is being asked of it. If it doesn't then it is not developing the amperage required of it to maintain that voltage. I hope that makes sense.
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Old 02-01-2014, 03:54 PM
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Mine was producing 13.8 to 14 volts but under load with truck and a load put on with the machine at the garage the amperage still wouldn't go above 50.I was chasing that forever then I took truck in to have batteries tested for replacement and he checked everything out with the snap on machine and tested for amperage instead.
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