Hi guys. Newbie here to the site. Thanks for letting me join aboard. Been having trouble with my 01 civic. It will stumble and hesitate but only in the mornings on cold startup. After it warms up it runs and idles fine. Although I ocassionally get a CEL when driving. The codes I get are P0300, 0301, 0302, 0303 and 0304 which are for all 4 cylinders indicating a misfire. Ive replaced sparkplugs with OEM NGK's, checked the vaccum lines for leaks and the TB cleaning and the IACV cleaning as well. All is good around there. The one thing I want to do is test t he fuel pressure but I cant find a adapter to fit into the quick disconnect line for the fuel. Im thinking I either have a bad fuel pump or faulty pressure regulator. Is there anywhere you guys know that i can buy this adapter?