I have no spark , fuse is good , maybe bye pass code ?

5.7L
no code told, why skip the most important fact?
P03xx (what is the XX)

code 300 is means all cylinders misfire,
301,to 308
my wild wild guess is P030x code
this misfire, means, this. in TRUTH
that cylinder has bad combustion. (means weak only or dead)
caused by 3 things.
1: bad spark plug. or wires to it. or cop coil if is.
2: bad injector.
3: bad compression this cylinder or water or oil landing here.
3b: bad cam lob on X
3c bad piston on X cracked,.
3d, valves burned, X
and more, even cracks in X. all things inside X

the service manual is online
https://eautorepair.net/Marketing/Default.asp


the injectors all have a 12vdc power rail to a fuse. 5.7L/4.7
as do all 8 COP coils. (i bet one is bad or just boots to it bad))
all 8 injectors use that one 12vcd fused feed line
these are called PnP injectors. 12v, 0v, 12v, 0= fire.
the coil on X unstated injector is about 12 OHMs , no not zero nor infinity a super basic test that
moving the injector if bad, (side swaps) the TDC error moves with it.one more basic test.
a simple NOID lamp test shows if the PCM is firing it.
here is the schematic in part.




now all tests a short list
All fuses good , not guessing testing./
spark plug good on X
spark COP boot replaced, $15 cost, cheap on X
compression on X passes
spark tip not soaked in OIL or ANTIFREEZE on X
Injector ohms out good and NOID lamp passes on X

the injector and COps run off fuse #10- 30amps.
if blown the ASD relay is dead, so fuse 10 is not dead
because ASD is closed now and engine runs. (no stated be inferred)

bad engine, bad spark or bad injector, on cylinder X
X not told.
there are other possibles. like cylinder X has a vacuum leak
in Intake X port, gasket cracked, lean burn misfire.
leaking injector
we do the FSM (SM) book injector leakdown test and balance test to find that.
and more. ask for more tell what X is?

do you have spark? fuel pressure/? not everything sets a code

You can't, unless you want to push your scooter everywhere. The CDI box stores an electric charge that is sent to the coil to create a spark that makes the engine run. No CDI, no spark at the plug.

Generic Chinese CDI's sell for less than $10 and are perfect, if unreliable, copies of Honda CDI's. Just get the same kind of connector as on your CDI.

Check timing belt, possible jumped time, stripped teeth, etc...

Check for an ecu fuse, efi fuse maybe, find out why no hot wire on that B+. All fuses good? There's possibly another power wire to the computer, not always just one.
If fuses are good and still no power on the B+, check that the fuse block is getting power to it. Use a test light or multi meter.
I would have thought the codes were probably erased, but did you find any useful ones?

How About the CPS Crank Shaft positioning sensor? otherwise Sounds Like( Im Not Sure what you are saying you replaced the ECM) Electronic Control Module) ? Or Electronic Control Unit? Otherwise Checking to make sure you have a good ground from the battery to the motor to firewall as well,also im pretty sure there is a switch in your fuse box for the ignition and fuel pump last but not least coil could be bad even though you have ohms and how many ohms?(ps you said you forced spark thru hooking strait up to positive you got little Spark when you did that? if you did sounds like ground or low voltage or Bad Coil !! have you hooked up and tried to pull a code ? I hope this helps!!

Do the spark plugs have spark?
Also check the condition of the air filter.

Is the vehicle fitted with an immobilizer?

Leave it for half an hour with the ignition on and door closed, it should re set (this happens when the wrong code is used for more than 3 times) check for a sticking button, sometimes they go sticky with a lot of use, if you do get the green light just umplug the keyboard when running and it disables the system. If you cannot get the green light try leaving the battery off overnight with the lights switched on then connect the battery, if still no with the ignition on and someone in the car spark the earth lead to the battery untill the green light comes on.

If you have any oil getting on hose that could cause premature failure and are you using a factory hose or maybe a hose for gas or oil rated hose