If it has an idler control valve, and most do, I'd go with that.
Your 1994 Honda Civic will overheat when the thermostat is malfunctioning. The overheated engine can experience the idle to surge. The engine should be turned off immediately.
There can be many causes for a Honda Civic to stall. Some of them include a bad fuel pump, a bad alternator, a bad distributor, a clogged air filter or idle air valve. Buy a Honda Civic Service manual for more information. http://www.HondaCivicRepairs.com do it myself Honda civic repair
Bad oxygen sensor
Idle on a 1985 Honda Civic is adjusted through a idle air control valve. This valve is located near the intake. Adjust the valve by either loosen or tightening it.
The idle speed on a 1996 Honda Civic is adjusted using an IACV. The IACV, or idle air control valve, lowers and raises the idle by either being tighten or loosen.
To adjust the idle on a 2005 Honda Civic locate the idle control valve. The IACV and is found near the intake manifold. Open the top of the valve and tighten it to lower the idle or loosen it to raise it.
Separation of the ethanol due to water in the gasoline.
Idle Air Control Valve.
The Honda Civic loses idle at stop due to not have consistent air flow. The engine will run too lean and cause the car to shut off.
IF ITS JUST AT IDLE, CHECK YOUR IDLE AIR CONTROL VALVE IF IT HAS ONE.
The idle speed on a 2001 Honda Civic is adjusted through the idle air control valve. The valve is located behind the intake manifold. Open the cover using a screwdriver and tighten the valve to lower the idle.
It is important to know the causes of problems in a vehicle. A surging idle can be cause by a bad o2 sensor, bad fuel pump, or a computer starting to go bad.