I'm having a problem with my civic it idle if I step on the break, which is weird... it doesn't do it when it's just sitting there, while the engine is running. and when my battery light comes on my rpm is high up to 2,000 rpm. and when my battery light goes off my rpm drop back to normal. at 750 rpm... my battery lights goes and come,(off and on) it makes my car run funny when the battery light is on... please help thanks for your time.

 

Can someone please help? cause I'm clueless... I don't wanna start buying things, I'm a poor kid just trying to fix my car before winter hits... please help if your out there, please....

 

I am wondering if you have a charging issue, and it wants to die.

Test your charging system, first the battery see if you have 14.1 volts running and with the key on should be around 12 volts.

 

Thanks for the reply, I'll do that and let you know...

 

Is not the battery, I was having problem with my cooling system so I bleed it. So this is how I did, open my radiator cap and start my car up till it's warn and turn my heat to MAX until it stop bubbling out of my radiator. So I waited till it stop bubbling. Then I turn on car head lights and it start to Idle and my radiator starts bubbling again... it's almost like when I'm using power as in(power window, lock, step my break, ac is on, head light is on, etc... My car seem to idle, but if I'm not touching anything it doesn't idle rpm will just stay at one spot. Please someone help me on this and I'll thanks you very much for your time, thanks again....

 

what other charging can it be beside the battery? please help... :/

 

Check your grounds. Check your battery terminals. Maybe you have a short in the brake-light circuit?

 

Alternator??? Take it in to a parts store and have them test it.

 

I check all the ground wires to the engine bay. All the ground wires are where it should be, but it looks like it has a lot of wires from the battery to the back trunk. The car looks like they use to dump speakers, and so I disconnect the wire to the battery which is the positive. That didn't do it. I notices that my revers tail lights aren't working but my breaks and tail light works. I check all my fuels and they all are good.

And if not I'll have to take out all those speaks wires...

Alternator, it better not be... cause the car runs fine and starts up like a champ, but I will put it out, just to have it check.

Here's the thing I notice that the battery lights only comes on when the engine is running cold, mean when I first start the car up. But after while or if I drove it off with it or when the engine gets warm the battery lights goes off. The rpm drops from 2000rpm to normal rpm which is 750rpm.

All these problem seem to be one problem. ((Idle, power, battery lights))
(sighs) thanks you guys for the reply.

 

Maybe you should actually clean all of your electrical grounds instead of "checking them" unless "checking them" consists of you taking a multimeter and measuring the ohms from the one point to the battery negative terminal and getting a reading of less than 0.5ohms.

 

When the charge system light (battery symbol) turns on, it is almost always the sign of a bad alternator. However, first check the alternator belt tension and whether any alternator mounting/bracket bolts are loose.

 

Thank you guys, for your time and replying to help me troubleshoot this battery problem, the problem was the alternator was bad, I had it check/test at auto zone and it fail like 3time, so I replace a new one and (no) more battery light turns on, thanks again.