5.0 liter Alpha alternator "jerking"

off course

Cadet
Joined
Jul 24, 2007
Messages
10
I replaced an alternator that was not charging with a new replacement. When it is running (w/new alternator) the alternator jerks like it is being "loaded and unloaded". This jerking makes a clicking noise as it happens. The problem is sporadic, it seems worse as the rpm's increase, but at times goes away completely. The jerking finally started to eat the serpentine belt, so I idled back to the trailer. The voltage gage goes from plus to minus w/ the new alternator, I don't believe it is charging. Thanks in advance for any help,this site has helped with several problems I couldn't find answers for anywhere.
 

Bifflefan

Commander
Joined
May 27, 2009
Messages
2,933
Re: 5.0 liter Alpha alternator "jerking"

Sounds like you forgot a bracket.
Did you have the old one tested to make sure it was at fault?
 

Alpheus

Lieutenant Commander
Joined
Aug 3, 2009
Messages
1,757
Re: 5.0 liter Alpha alternator "jerking"

Bad alternator. Take it back...
 

off course

Cadet
Joined
Jul 24, 2007
Messages
10
Re: 5.0 liter Alpha alternator "jerking"

The "forgotten bracket" was the 1st check,no luck, everything was there.Returned that alt. and picking up another (more$$$) tomorrow. Thanks for the help.
 
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