Sabo Posted August 21, 2014 Share Posted August 21, 2014 Hi everyone, I have 2006 350z (130000km) recently I have voltage problem When I make a hard acceleration,my alternator is failing down and stop working at the same time hand brake and battery lights on. 1 week ago I went to the Nissan service, technical service 4 days tried to find out what caused the failure. finally yesterday they called me and told me the name of the problematic part. The name of the broken part is Solenoid Valve. technical service said dysfunctional parts need to be replaced than I said ok, change it and they replaced to part, they put the new one and I took my car today, and I've tested but but nothing has changed everything is same I immediately called the person in charge and he said come back again I do not want to go there again What do you think causes the problem. Please help me guys They said alternator and battery working fine also all cables all connections are fine what else?? Thanks Quote Link to comment Share on other sites More sharing options...
Commander Posted August 21, 2014 Share Posted August 21, 2014 what volts do you get when; engine off? engine idling? full acceleration? You should have 12v with engine off, and about 14v with engine running. Sounds like an alternator problem to me at the moment. Quote Link to comment Share on other sites More sharing options...
brillomaster Posted August 21, 2014 Share Posted August 21, 2014 agreed the voltage should go up under hard acceleration, since the alternator is belt driven and the belt will be driving it faster. might be an idea to check the state of the auxillary belts and that they're all nice and tight, and check the alternator bearings aren't seized or anything. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted August 21, 2014 Share Posted August 21, 2014 Actually thats incorrect, the alternator output volts wise will rise and fall depending on the battery's state of charge, if the battery is fully charged the voltage output will be regulated down, so watching a volt meter will not always give the expected reading. Quote Link to comment Share on other sites More sharing options...
Sabo Posted August 21, 2014 Author Share Posted August 21, 2014 normal driving voltage is 14-15v when I change the gear in high RPM 3 or 4 times my voltage goes down around 12v. I think the alternator stops only the battery voltage stays. that time car using only battery voltage after the normal driving alternator suddenly coming back and voltage increasing to 14v again. Quote Link to comment Share on other sites More sharing options...
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