No idea?!Are you doing that thing where, if you turn the ignition key too far 'off' it puts on your parking light and drains the battery? Just me then?
Its either the starter solenoid or the starter motor. Without me listening to where the noise is coming from it is difficult to say for certain.Connecting jump leads gives it enough power to overcome the issue.
Most likely the solonoid acting up due to corrosion on the big contacts I had to change a few of them over the years and any I dismantled were all the same, corrosion on the big copper contacts.The corrosion reduce the current flow to the starter making it sound like the battery is low. The only other issues could be worn brushes on the starter motor, but I would change the solonoid first
Dont discount a dud battery though. My car had a 2 year old Yusa battery, car failed to start the AA man tested it on his special machine and said the battery is fine, usually this machine fails batteries even good ones. He said the problem was an intermittent electrical drain!!!I charged the battery and then disconnected it over night and low and behold it discharged. Computers what do they know.Went through 3 days of testing at my local autospares and they confirmed a dud cell.What i am saying is even if the battery appears to be behaving charge wise it may still be dud.But i also reckon its the starter.
My thoughts does this on occasion, if I wiggle the key about it starts, so I'm going with worn ignition.
It's unlikely to be the solenoid, if it was stuck there would be no noise and jump leads wouldn't make a difference. The solenoid needs very little current to operate. More likely to be the starter motor stalling when in certain positions.
Quote from: clayt74 link=topic=20471.msg236101#msg23610mickvp1 date=1467650470It's unlikely to be the solenoid, if it was stuck there would be no noise and jump leads wouldn't make a difference. The solenoid needs very little current to operate. More likely to be the starter motor stalling when in certain positions.I really hope the battery does sort it for you!But I would have thought a battery issue would be a more regular fault rather than an intermittent one?If it doesn't sort it, I still think starter motor. Good luck
Probably a long shot but a mate of mine had trouble starting his car, bought a new battery but it cured nothing, turned out it was a bad earth, might worth checking.
We deal with lots of batteries at work so the engineers have a good knowledge of their behaviour, and one of them is totally convinced i have a dud cell.I have no reason to not believe him.Should be delivered tomorrow and hopefully he'll be proven right.
Quote from: darrsi on 20 July 2016, 06:27:04 pmWe deal with lots of batteries at work so the engineers have a good knowledge of their behaviour, and one of them is totally convinced i have a dud cell.I have no reason to not believe him.Should be delivered tomorrow and hopefully he'll be proven right.A bit late now since you've spent yer money, but a few seconds work with a voltmeter might have been informative.