Car Won't Start Without Jump

[Ad172UK]

Not a clio, but my old 206. I imagine the problem would be universal though?

Basically the car sits idle for a day or 2 and then won't start without a jump off the clio. Ive put the battery on a charger, but it comes up as fully charged.

When i put the jump leads on it's an instant start, i don't have to leave them ticking over or anything, i just pop them on and it starts straight away. But as im trying to sell it it's not exactly a unique selling feature so id like to sort it.

Has anyone got any ideas??

 

[riz]

check battery terminals

 

[Tom84]

battery can still be dead

when u think its fully charged hold main beam on for 5 seconds to remove the surface charge then check the battery voltage, if its below anythink like 12.0v change the battery if its around 12.5v then the batt is ok

may sound like a small amount but after the battery is flattened for too many times it damages the interals of the battery

 

[bmh.01]

Batterys dead, just because it charges ok doesn't mean it can hack the required starting current.

 

[daviebroon]

as said... deffo battery. My clio done the exact same thing. New battery sorted it

go to halfords/kwiik fit/etc for a free battery check to confirm. No need to buy from them... go to a motor factors

 

[steve32c]

i'll jump on the band wagon too - duff battery

 

[adstevo-172cup]

i had the same problem on my 172 cup it turned out to be an earth strap that was corroded an easy way to check if this is the problem is to just connect the negative jump lead to the negative terminal on the battery and connect the other end to where ever you can under the bonnet anything which is bare metal then try and start the car

 

[Firas]

if you are loosing power as well it could be the alternator

 

[Peperami]

Sounds like the battery. As said will still come up as 'charged' when you try and charge it, despite being duff.