Hi,

I have a '99 Civic with B16A2. It started stuttering a bit when engine is cold, now it won't even start, or stops immediately, I have to try for 5-10 minutes in the morning for it to start properly, then it runs fine and smooth.
It's 20°C (70-75F) even at night so it's not related to ambient temperature. I've cleaned the fuel system starting with the fuel tank all the way to the injectors so I'd say it's something with the ignition or injection, but I have no further ideas where to start. Does anyone have a suggestion?

Thanks in advance, cheers!