[Diy_efi] CS Failure

Mike V efi
Tue Nov 29 04:04:22 UTC 2005


Tom, that was a good read.  Thanks!
Mike V

At 10:37 AM 11/28/2005 -0700, you wrote:
>Total your two voltage readings.  This is the "voltage drop" in the 
>charging circuit.  It is a reflection of the resistance in the circuit - 
>resistance which will put a long-term strain on your alternator's diodes 
>and overheat and kill them.  If you get a total of greater than 0.1 Volt 
>per 10 Amps of alternator output, that is too much voltage drop and the 
>connections and/or wires and cables will need to be improved.  For a 
>standard 105 amp CS130, 10 gauge wire straight to the battery, with a 14 
>gauge fusible link, is sufficient.  For a "high output" alternator, 8 
>gauge with a 12 gauge fusible link is recommended.  Also, you can't have 
>too many grounds.  Besides keeping your alternator alive, quality grounds 
>(less than .050 volts drop) will help stave off computer stupidity.  You 
>would be astonished at the number of vehicles that leave my shop with a 
>sub-$150 repair (diagnosis, labor, parts, tax) when other shops told the 
>customer that s/he needed a new ECM or a stack of new sensors.
>
>TomV





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