This is not a battery problem. Your charging system, the alternator, is not putting out enough juice to charge the battery until you reach 4000 rpm. Have the alternator and charging system checked.
The alternator is not charging the battery, therefore, the coil is getting it's charge only from the battery.
make sure the small wire is hook to the post
It sounds like you have a break in the wire which connects your alternator to your battery, get it checked out.
Battery is dead?
Make sure the battery cables are making good contact with the battery and are clean and tight.
i had this happen once on an 03 dodge minivan. the alternator went bad and the battery was going dead but had enough power to get the engine started. once i replaced the alternator and charged the battery the gauges worked again. good luck!
I had the same problem on my '96 golf mk 3, it can be either a) not making contact on battery terminals or b) the battery needs to be replaced... Hope it helps 1) new battery may be the needed if its not solved, check the fuses (couple need be replaced) ,i did that started working.
My epc light came on because of battery failure. My battery was acting funny and barely starting the car. I went to autozone and had them check my battery which ended up having a bad cell. I replaced the battery and the car easily started up. After the car started the light never came back on.
First, why was the battery replaced? If there was a pre-existing problem (like a bad starter, for example), replacing the battery will not solve the problem. If, however, the car started fine before battery replacement, then the problem could be that the battery terminals (clamps) were not sufficiently tightened. Don't laugh, but there have been instances where the plastic cap(s) covering the new battery's positive and negative terminals were not removed (duh!). Remove those plastic caps.
It is definitely caused by a problemtic cooling fan relay. When the bad relay shorts internally, it causes the fan to stay on at all times which drains the battery.
Yes, the car can be started with the battery charger attached to the battery as a boost.I been doing that for years.
Assuming it started and ran before you changed the battery, and changing the battery actually is when the problem began, the starter relay wire has been left off and needs to be connected at the battery terminal. I would need more information to diagnose it further.