i have a 99 honda accord LX 4cyl. and it won't start unless i give it a jump. i bought the battery last year and the starter was changed last month. i tested the the battery with key off engine off and its at 12.6 v and after a jump with key on engine on the battery is at 14.7v. i thought it was my alternator but according to some of my researching online, if the battery is around 14ish volts with koeo, the alternator is still good, but i can be wrong. my mechanic skills are really minimum so can someone please help..thanks

 

Your saying it will not crank, [starter motor not working] unless you give it a boost, [jump] is that correct?

If so, redo your main grounds, batt. post and cable clamp, batt. to chassis, batt. to engine/chassis to engine, DO NOT just eyeball them, disconnect/clean/reconnect.

Also, try a bypass jump without a boost...

https://honda-tech.com/forums/tech-misc-15/simple-diy-start-circuit-test-%5Bbypass-jump%5D-2961164/ 94

 

i got the starter tested and its still good. one thing i forgot to mention is when i give it a jump and when it starts up it drives fine but as soon as i turn off the engine, i lose power to everything (headlights, dome lights, stereo, and etc.)

 

Sounds like a poor ground at the battery. Disconnect the negative battery terminal, inspect and clean it and the post(in fact do that to both neg and positive,it cant hurt.)

 

Ditto the above^^^ in fact, redo all your main grounds, DO NOT just eyeball them, disconnect/clean/reconnect. 94

 

you're right on..the battery wires were full of gunks and after clean it it start right back up..thanks everybody for all the help