Does an Acura Integra have a EGR valve?
integras dont have egr valves... accords and preludes do.. via
How do you clean a Honda EGR valve?
Spray the inside of the EGR valve with carburetor cleaner, then shake the EGR valve out. Carefully scrape stubborn soot off with a screwdriver. Wipe out the inside of the valve with a rag, making sure it is completely dry before reinstalling the valve. Place a new gasket on the intake's mating surface. via
What does an EGR valve look like? (video)
What will a stuck EGR valve do?
If your EGR valve is stuck in the open position, it can allow too little or too much exhaust gas into the combustion chamber. This can throw off the air/fuel mixture inside (which needs to be perfect) and cause the engine to idle rough. via