2005 honda crv 2.4L L4 DOHC 16V at start up attempt, cranks, cranks, and cranks but will not fire up...what is the problem?

Need to check fuel pressure, and check to see if there is spark out of the coil.

its the standardising of tune too lean or...the comps cant recognise what the variables are happenig in the cylender at exaust flashpt vent/valve-timed out dankness if you notice a jump in fuel use and lack of go this is a serious thing to be concerned prior to this as in my case with my f22b vtech almost killed my battery and left me stranded on the highway in a 80km/hr bigin zone another friendly tip honda uses the delta 2 method which is a crap method since mercedes built sis way back then,since they realy dont know how rich the fuel is in its state being delivered mine was 11.723 and as this is in dispute by almost all by the book mech-heads i however don't go whole heartedly with this norm of the line think tank principals as each engine is unique and in my opinion a timing gismo and a wire is no substitute to 300k of gear and a full on experienced test driver working for a reputable automotive company so if your d o n k shows the need to be aworking the accelerator with readings of a constant 40kms at any rate of rpm stoking get it onto a reliable experienced mechanic and as a last resort dynoperfomance test it it is possable to crash start it like i did when this happened to mine but be aware if its over an hr since it went sour its not likely to go at all as the efi is lost for good and thats silly moneyfor getting it to work since a cold engine can't reignite on any residual vapourous residue still in the combustion chamber in my case i went to the floorboards and kept pushing till it did just that and managed to get it to go 3/4-1/2-1/3 part cranking it... lightning fast reflexes are a must as as soon as you achieve ignition put it in neutral (sorryif you have a manual) and play into the gas pedal when its bruuppupurrrs take care not to overload it and keep it going then into a lower gear or drive whilst managing it all and left ft braking to keep headway progress movement going forward unfortunately this is not a long term solution and after 3years the engine will deteriorare as in my case sell it with a limited liability warranty making sure the new buyer knows its problematic past history or sell it another way without the worry it is to be ever used on the road by a mum and dad familly-maybe for parts as its more added valued that way i did get it fixed and have so done all this so i am and have experienced this personaly in the great journey of car ownership