According the 1994 Acura Integra LS manual, recharge the system with Refrigerant HFC-134a (R-134a)
Honda Approved ATF or Dextron II
R134a
Since the Integra Type R wasn't introduced until 1995, a 2000 Honda Prelude should be faster than a 1994 Acura Integra.
5-w30
The 1991 Acura Integra brake lamp number is 2057. See sources and related links below for a picture and more information.
4 qualts or 4 bottle of oil
The manual that came with my 1990 Acura Integra GS indicates to use Dexron II. If you change the fluid only it's 3.2 qts. I hope this answers your question.
could it be the thermostat or the fan itself?
R134a
Four quarts give or take about half a quart, if it has Vtec it will take a little more oil about quarter to half a quart depending on the size of the engine. 1.8L B18B1
the number one cylinder is located on the pulley side, then goes 234 to the transmission side.
This usually indicates that you have a wheel out of balance. Have you tires balanced and rotated.