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04-07-2018 #1
Low 11V charge at idle but normal just off idle
Hello all...bit of an odd issue here. Got low voltage at idle (11.5 or so), but the second it goes off idle its up to normal. Now the ground strap is brand new, as is the battery. The pulleys are a March serpentine setup, 75mm and 172mm for the Alt pulley and crank pulley so 2.3 ratio. Alternator is 3 wire and has plenty of power to run electric water pump, fans etc, but the issue is I have EFI now. So when I come to a stop and the ECU sees less than 12 volts it shuts down.
Any thoughts?Manuel Scettri
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1973 Firebird - Pontiac 455
1990 2 Door 4Runner - byebye
1990 2 Door 4Runner - byebye
2016 KIA Sportage diesel - The Daily Driver
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04-07-2018 #2Registered User
- Join Date
- Mar 2005
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- 345
Get a better EFI system? No reason it should shut down at just under 12 volts. Cranking voltage is usually in the 10 volt range, maybe it is something in the tune? Bob.
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04-07-2018 #3Registered User
- Join Date
- Oct 2014
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- DFW, Texas
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- 422