Why it is hard to start first thing bin the morning?

I don't know where it is on an Acura but every modern car has a sensor that tells the ECU the engine is cold, to give it a rich mix for cold start. Some cars simply the coolant temp. Others a head temp sensor. Keeps it in open loop until warmed up. No check Engine light on?

HATE TO SAY IT. CHANGE THE FUEL FILTER AND RUN 2 CANS OF FUEL SYSTEM CLEANER THRU IT.A FEW EXTA LBS. OF FUEL PRESSURE MIGHT JUST FIX IT UP...

Thanks, my engine light has been on before this, it was never reset after it was serviced.