www.ultimatehandyman.co.uk

rover 218 1993,when car is left over night it wont start just clicks as if battery flat,new battery ok for few weeks then start all over again,sometimes starts with jump,sounds like something draining battery thought it might be alarm(standard rover one) when locking car so started to leave unlocked in garage but still the same,any one had this problem or any ideas.

i know this happens on toyota supras sometimes. the recomended mod for them is a relay to feed the solenoid as voer time the resistance in the thin wire to the solenoid becomes to high.

Ill dig the link to that fix out as it may be of some use. even though they are obviously different cars

http://www.forum.mkiiisupra.net/showpos ... stcount=37

this may help or may not. also im assuming diesel starters will work in the same manner as petrol starters.

is your car charging the battery ok when on the move ?

could be about flat when you park it up at night

If only first thing i would conside a high starter current draw

I would be inclined to check the starter motor, this sounds the same as as Landrover we once had, i initially thought it was the battery as i would just die overnight and either be very slow at turning over or it would just click we had a new starter fitted and it was sorted

all of the above really and other things to check are:

battery drain; check all lights inc any in the boot to make sure they are all off. make sure nothing like iPods etc are left connected as some act as chargers. you can use a volt meter (multimeter) to see if anything is drawing current.

alternator charge: the volatge regulator may have given up... check the voltage across the terminal to make sure its charging properly (off the top of my head it should read 14.4v on fast idle; 12v or close to 12v when engine off). you could check first thing to see how much juice the battery has.

change battery again; you should have some guarantee with it... its not unknown for new batteries to be duff.

winter is always the time when dodgy batteries let go.

have you investigated to see if you can disconect the original alarm completely? i had a problem on my supra where it would randomly cut out. was a nightmare to locate till i accidentally disturbed a well hidden wire that had been spliced for the alarm. never had a problem since that day

fin what supra you got mate?

Could be a faulty diode in the alternator diode pack. It will drain the battery when switched off but will charge it ok.