Henk Posted June 8, 2007 Share Posted June 8, 2007 OK laugh if you want I left my lights on when I arrived at work yesterday. My alarm keyfob warned me of battery issue a few hours later and I went to investigate. Side lights dim, no juice for starting, jump started off a colleague, left both cars running for 20 odd minutes. End of day few hours later car starts no problem, drove home (45 mins) parked in garage, thought no more of it. This morning dead as a dodo, dash lights but not even a click when trying to start. Jump started off daily driver (determined to drive the Supra in this weather ) went to work all electrics turned off, no AC, music etc. (Exhaust & turbos is all the music I need ) End of day dead as dodo, jump started, now home. So Battery not holding a charge anymore, does running it down once kill it? Link to comment Share on other sites More sharing options...
DaveK Posted June 8, 2007 Share Posted June 8, 2007 Considering you don't know the history of the battery anyway, it might not only have been run down once. I'd certainly replace it before I worried it was something else. How did you manage to leave your lights on? Mine has an alarm. Link to comment Share on other sites More sharing options...
Henk Posted June 8, 2007 Author Share Posted June 8, 2007 How did you manage to leave your lights on? Mine has an alarm. It does?! Mine's a 1993 GZ TT Auto, no alarm, no noise or anything. I best go on a fuse check or something right? Link to comment Share on other sites More sharing options...
Joeatphr Posted June 8, 2007 Share Posted June 8, 2007 OK laugh if you want I left my lights on when I arrived at work yesterday. My alarm keyfob warned me of battery issue a few hours later and I went to investigate. Side lights dim, no juice for starting, jump started off a colleague, left both cars running for 20 odd minutes. End of day few hours later car starts no problem, drove home (45 mins) parked in garage, thought no more of it. This morning dead as a dodo, dash lights but not even a click when trying to start. Jump started off daily driver (determined to drive the Supra in this weather ) went to work all electrics turned off, no AC, music etc. (Exhaust & turbos is all the music I need ) End of day dead as dodo, jump started, now home. So Battery not holding a charge anymore, does running it down once kill it? Putting a battery down to its very last volt and still drawing off of it could damage it long term, if it has had any age and been used for some time, it may not be able to recover from it and regain its charge. Also check your alternator and make sure that is supplying the proper amperage to the battery. What all are you running in your car electronics wise? Is it a stock Alternator? cheers, Joe Link to comment Share on other sites More sharing options...
Henk Posted June 8, 2007 Author Share Posted June 8, 2007 I've no way of knowing how old it is nor it's history as it was with the car. However, as soon as I realised (each time) it was dead I stopped trying and jump started with at least a 45 minute drive home charging it. (Stock alternator, looks in great condition) Electrics wise, stock car with following additions: Clifford Matrix 3.5x Apexi AVC-R AEM Wideband JVC Double DIN 7" DVD screen/radio/MP3 player I've no idea what equipment I need to check alternator performance, any tips? Link to comment Share on other sites More sharing options...
Class One Posted June 8, 2007 Share Posted June 8, 2007 halfords hcb005 Link to comment Share on other sites More sharing options...
chilli Posted June 8, 2007 Share Posted June 8, 2007 halfords hcb005 I second that, good battery for the money and money well spent as it's such an important component. 4 year guarantee too! taking a battery to completely flat often will damage it, they really don;t like it at all and now one or more of the cells might be dead or dying (sometimes you can see this as they get damp on top when charging). get a new one and stop worrying about it PS: if it was completely flat it will take quite some time for it to charge _fully_ again anyway... Link to comment Share on other sites More sharing options...
Henk Posted June 8, 2007 Author Share Posted June 8, 2007 I did already purchase one of those HCB005's I disconnected the battery, fitted new one (remembered to switch side lights on before connecting new one) Car starts fine, but.... Runs rough as shit!!!!! Having trouble idling, nearly stalls. Remember stock ECU here with only 1/2 BPU. Will this go away? How do I get the ECU to re-learn how to idle? Link to comment Share on other sites More sharing options...
chilli Posted June 8, 2007 Share Posted June 8, 2007 try taking out the two EFI fuses (30A green ones) for a bit then reconnecting to reset the ecu properly? also, have you tried to drive it to see if it goes away, they relearn the closed loop settings don't they? Link to comment Share on other sites More sharing options...
Henk Posted June 8, 2007 Author Share Posted June 8, 2007 I daren't drive it in case of doing damage. It's hardly idling, barely hanging on just above 500 rpm AEM Wideband normally shows 14.6 or 14.7 at idle, it is off scale high, so over fueling right? I tried removing Fuses, had battery disconnected for about 20 mins, cleaned battery terminals. Does it instantly reset? Do you drive it for it to relearn? Don't want to risk anything.... Link to comment Share on other sites More sharing options...
Class One Posted June 8, 2007 Share Posted June 8, 2007 It needs to be driven to re-learn afaik. Consider the aem to be a "worry gauge", if it wasn't there you wouldn't worry about it. Take it out for a 20min drive of mixed stuff and see how it goes. Link to comment Share on other sites More sharing options...
Henk Posted June 8, 2007 Author Share Posted June 8, 2007 OK will go out for a bit, update later. Thanks so far! > Link to comment Share on other sites More sharing options...
Al Massey Posted June 8, 2007 Share Posted June 8, 2007 (remembered to switch side lights on before connecting new one) why do you need to do this? am i missing something? Link to comment Share on other sites More sharing options...
Henk Posted June 8, 2007 Author Share Posted June 8, 2007 All fixed! Thank you all! You were right, in fact just driving it 200 yards was enough. I was worried though because it was well rough those 200 yards! Turning side lights on when connecting battery can protect things like your alarm, ECU etc. from receiving a power surge when you reconnect the battery. Top Tip from TurboFit on my first visit there (never forgotten it) Link to comment Share on other sites More sharing options...
Al Massey Posted June 8, 2007 Share Posted June 8, 2007 cool il remember that one everyday is a school day Link to comment Share on other sites More sharing options...
markssupra Posted June 9, 2007 Share Posted June 9, 2007 Well I never, you learn something everyday. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now