I have a 94 honda accord lx. When cold it idles low and rough until warm. Once warm its fine i changed plugs oil filter air filter and fuel filter. I even tried cleaning the idle air control valve. Please help

You may have dirty fuel injectors - once the engine warms up and goes to closed-loop operation, the computer can compensate for clogged injectors to some extent. Another possibility is sticky valve lifters that work better once the oil gets hot - if this is the case you may hear a rhythmic tapping noise in the valve train at idle while the engine is cold.

tune up,fuel filter,air filter,clean throttle body.

Although is could be a fuel filter, it could also be a fouled spark plug, or a bad spark plug wire. Once you've ruled these things out, the problem could be the TPS (throttle position sensor). This controls your idling speed under all conditions. A faulty TPS will usually idle fine when the engine is cold but once warm, will tend to sputter and in some cases, stall.

it may be idle control sensor or a bad mas air flow sensor--maf sensor in otherwords. or could be engine misfire at cold temp. start. only time when cold? or does run better when warm? try warming engine to operating temperature before driving,if problem removes it's self after warm up,up grade gas to 93 octane for 1 tank full. then see if problem goes away. it's cold where you are right? if so the fuel needs to be at least midgrade 89 octane fuel because 87 octane fuel will not start your honda correctly at cold temps. in cold weather 93 or super gas octane will start ,no problem,low octane fuel sometimes gels, or freezes at low temps. if in warm climate, change the fuel filter, add fuel injector cleaner to your fuel tank[preferablly lucas fuel treatment] this will lube your fuel injectors and give better fuel mileage. thank you for choosing fixya.com

Could very well be the main relay, limiting power to all the electronics in your car, causing the problems you've mentioned. Have it repaired or replaced.

Tune-up spark plugs wires check coil pack

Perform a valve clearance inspection and adjust if necessary. Tight or sticking valves will cause a misfire or rough running concern. Note: Perform valve adjustment when the engine is stone cold. 4cyl: INT 0.26mm EXH: 0.30mm (V6 engine are hydraulic and no adjust necessary.) Also check for a sticking or stuck open EGR valve. For diagnostic purposes only: Remove the EGR valve. Place a business card over the EGR passage and bolt the EGR valve back on. This plugs the EGR ports and if the misfire goes away the EGR valve is partially stuck open and is defective.
Check for low fuel pressure. Check for low compression. Check cam timing. Check for a weak ignition coil. Also don't over look the possibility of worn or broken engine mounts which cause excessive engine movement and engine vibration. -hope this helps

try the control module

a good tune up shall solve your problem. replace the ff: spark plug. spark plug wires, air filter, fuel filter, and an oil change, good luck!

have you try cleaning also the air filters..? fuel pump..?