SPARKIE Posted November 30, 2008 Report Share Posted November 30, 2008 (edited) anyone know what size alternator is fitted to a 1993 2.5tdi paj and what the charging rate should be...oh and before billy backstreet says 14 volts i mean ampage..mines chargeing 26amp unloaded and 39amp loaded..does that sound about right i ask this because if its a 55/60 amp alternator im happy with it but if its a 100 this could be the reason my batterys keeps going flat that and loose alternator belts (just put new ones on so not loose now) hope thats fixed it cheers sparkie Edited November 30, 2008 by SPARKIE Quote Link to comment Share on other sites More sharing options...
auto culto Posted November 30, 2008 Report Share Posted November 30, 2008 anyone know what size alternator is fitted to a 1993 2.5tdi paj and what the charging rate should be...oh and before billy backstreet says 14 volts i mean ampage..mines chargeing 26amp unloaded and 39amp loaded..does that sound about right i ask this because if its a 55/60 amp alternator im happy with it but if its a 100 this could be the reason my batterys keeps going flat that and loose alternator belts (just put new ones on so not loose now) hope thats fixed it cheers sparkie looks to me like you have this back to front. A larger amp alternator does not draw more amps from your battery. The amp reading given is what the alternator is capable of putting back into the battery. Do you use this motor for regular lamping ? If so i would suggest you fit another battery to the system to run your lamp but you will need a switch fitting so you can isolate that battery from the circuit when lamping and activate it to charge it. That way you wont get a flat battery. If its just the cold weather then its probably the battery that's dropping overnight. What voltage are you getting at the battery when the engine is running and not running ? Quote Link to comment Share on other sites More sharing options...
SPARKIE Posted November 30, 2008 Author Report Share Posted November 30, 2008 looks to me like you have this back to front. A larger amp alternator does not draw more amps from your battery. The amp reading given is what the alternator is capable of putting back into the battery. Do you use this motor for regular lamping ? If so i would suggest you fit another battery to the system to run your lamp but you will need a switch fitting so you can isolate that battery from the circuit when lamping and activate it to charge it. That way you wont get a flat battery. If its just the cold weather then its probably the battery that's dropping overnight. What voltage are you getting at the battery when the engine is running and not running ? sussed it was the belt as given it a good road test and seems to be ok auto culto i had it the right way round.the alternator is charging 26 amps at idle and 39 amps fully loaded i just thought its a bit low but then thinking about it it has no stereo and its diesel no ecu to run so 30-40 amps is fine the vehicle is also fitted with twin batterys both was brand new last week as the cold got to one of them the reason it was loosing charge was the belts there was a piece missing and and they were very loose now ive fitted new belts all seems to be ok. when testing alternators you must go of the ampage NOT VOLTAGE the battery may have 12 volts at idle and 14 volts running.yes this show there is charge from the alternator but it could be low ampage(current) al seems to be ok at the moment so fingers crossed..lol Quote Link to comment Share on other sites More sharing options...
Dougy Posted October 4, 2019 Report Share Posted October 4, 2019 What do you get MPG wise Sparkie 🤣 Quote Link to comment Share on other sites More sharing options...
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