strange (to me) charging issue

J

john dezman

Cadet
Joined
Sep 13, 2004
Messages
11
Boat Formula 31PC
engines 454 (7.4) Chevy Bravo 2

(One) engine, at idle, will show appropriate 13+ volts. Advance throttle beyond 1200 rpm and line voltage drop to 10-11 volts.

What might be going on and how do i test and troubleshoot?

thanks in advance.
 
H

HT32BSX115

Supreme Mariner
Joined
Dec 8, 2005
Messages
10,083
Re: strange (to me) charging issue

Howdy,


Aside from checking ALL the ground connections, (clean and tight), to start, I would pull the alternator and take it to Autozone etc and have them check it.
 
Vanover

Vanover

Petty Officer 2nd Class
Joined
Sep 7, 2010
Messages
108
Re: strange (to me) charging issue

Could be a voltage regulator, most likely built into the alt. They might not be sending out the correct signal/ or geting a bad signal through the ground or power. Lose connection is a possibility. Like mentioned above they can test for these conitoins. Just make sure they get it hot (doing the test a couple of times). Put ti on hard load.
 
H

HT32BSX115

Supreme Mariner
Joined
Dec 8, 2005
Messages
10,083
Re: strange (to me) charging issue

Vanover said:
Could be a voltage regulator, most likely built into the alt. They might not be sending out the correct signal/ or geting a bad signal through the ground or power. Lose connection is a possibility. Like mentioned above they can test for these conitoins. Just make sure they get it hot (doing the test a couple of times). Put ti on hard load.
Click to expand...

Yeah!

I agree on that!

Travis AFB
Click to expand...
Home of the C-pive...... You do some of that stuff down there?
 
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