sometimes the car wont start

the age of the battery (10 years is long enough) the condition of the battery cables and the connection at the other end of the black cable (where it connects onto the chassis/frame) and to the engine block, all should be able to pull 300 amps CCA....clearly yours cannot. Get a new battery, clean or replace your corroded cables is going to be my judgement~

First of all you should check if there is a electrical problem or mechanical. (electrical problems > starter ) ... __________________________________________________________ www.dvdvideosoft.com

cannot do this properly without a good battery that can put out the CCA (cold-cranking-amps)...the starter will not engage fully without the amperage~