Honda Repair: engine idle problems, vacuum leak, oxygen sensor

Question
bill, my question comes in three parts.
1. i have a 1987 honda accord, which is my sons car.
  recently the car has been idleing very fast. when the car is first started it misses and i have to keep  
my foot on the gas pedal to keep it from dying. as it warms up it will keep running until it reaches its operating temperature. once it reaches its operating temperature it starts to idle faster. when it does this i have to rev the engine up higher in order to bring the engine back to normal idle speed. at normal idle speed if i barely touch
the gas pedal the engine will speed up again. this is an ongoing problem until i shut the engine off.
what causes this?
2. does this model car have an oxygen sensor?
3. the battery indicator light stays on all the time. it did not do this until it started having idle problems. could this be part of the idle problem?

Answer
Michael:
The care does have an oxygen sensor located in the exhaust manifold. The battery indicator would indicate the probably the battery or the alternator is bad or going bad. I would suspect the alternator. The idle problem is probably a vacuum leak, not related to the battery indicator light.
Hope this helps.
Bill