You may have several unrelated issues going on!
Is your check engine light on?
That would be 1st priority, prior to anything else. Get it coded. Might be pizzin' in the wind, with this suggestion, never the less, you need it done somehow, some way. If the light is on. Many auto parts stores will do it for FREE!
2nd---how do you determine 70% of battery. That definitely does not sound good!
3rd---If the battery will take a charge. Charge it. Remove it/ disconnect it from your rig, to do so!
But, when you do, you are probably gonna lose your codes!
"But, if you do"--is sorta a "catch 22", in your case!
Sometimes the computer gets confused if battery voltage drops below a certain point. Then ghosts, start appearing, some of which you have described!
But after a brief sit with no battery, and you install a fully charged one or a new one. They "may" go away. What a Deal. We hope!
If this does improve you, Immediately.I would have the charging system and battery (if still the old one) tested. Again, a Popular Parts Store will usually do it for FREE!
If you can halfway drive a voltmeter. Battery at rest should have at least 12volts (maybe slightly more, like 12.5 V) tested at the POSITIVE and NEGATIVE battery posts. And testing at the same location, Car Running, your alternator should be putting out around 13.8 or more.I do not know the specifics of your car. But.I do know one thing for sure. Running voltage should be more than--Key off voltage, otherwise your alternator/ voltage regulator are most likely, not working!
Let me know what your POA (plan of attack) is?
Friday, July 8th, 2011 AT 9:02 AM