I have a 1991 Accord with a 5spd F20A SOHC motor that is having problems
today.  I woke up to take kids to school and car was dead.  Car was not
started for 5 days and my wife said that yesterday she heard the cooling fan
running in the garage. Garage is heated to 55 degrees.  So, I jumped the car
and idle was fluctuating and car was running very "choppy".  When I hit the
gas, the engine sputtered and back fired through the throttle body. I left
the car running for the 10-15 minutes that it took me to drop off kids in
truck.  When I came back, car was idling fine(@850rpms) and running smooth.
I thought it was okay now.  I turned it off after another 10 mins and went
back inside.  Now, I started it and went to work and everything seemed okay.
When I went to go to lunch, battery was almost dead (laboring to turn over)
so I let it run for a few minutes, then as I was about to pull off, I turned
on the lights and the tach dropped to "0" like the car stalled but it was
still running.  When I hit the gas it was sputtering and back firing.  I
turned the lights off and the tach went back to normal.  I turned the heat on
and the tach went back to "0".  Hopefully I will be able to limp the car the
6 miles to get home without getting pulled over for no head lights.  

Any input is greatly appreciated.