| [GMCnet] electrical [message #370827] |
Fri, 16 December 2022 08:00  |
Hanson Email
Messages: 110
Registered: March 2020
Karma: -1
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Senior Member |
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What's the solution to an alternator putting out 15.5 volts? Replace it?
When the motor is normal temp, it bleeds into ignition somehow and the
engine continues to run 3 to 4 seconds after turning off the key. That
doesn't happen when cold.
Dean Hanson Fremont ca
403 engine
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| Re: [GMCnet] electrical [message #370829 is a reply to message #370827] |
Fri, 16 December 2022 09:37  |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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Dean,
If this measured at the alternator, it is about right.
If you have the correct regulator in the alternator, it should be compensating to the diode drop in the isolator and the line loss getting there.
If that is what the system voltage is, you need to replace the regulator module in the alternator.
If it is still running a carburetor then the "keep running" is a result of a combination of a high idle and carbon in the cylinders.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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