Engine

I went to the beach for one week in South
Carolina in my 1999 ford e350 van, and on
the way home it was acting weird, it
sounded like it was about to quit but
didn't. As soon as I got close to my house
it started to barley go, so after a while I
thought well maybe it would be the valves
so I bought valve cleaner, then I put good
gas in it, and it still was not going
anywhere. It stated but didn't move, it
would just chug. I thought I done did
everything I could, so I bought a OBD
reader (car scanner) to see what the
computer said was wrong with the van,
when I hooked the scanner up, it said
ignition coils E, B, A, F, so I ordered new
ignition coils, and spark plugs online and
changed them all. all 8 of them, then after I
changed them it still was misfiring, so I
thought well maybe the injectors, so I
cleaned all my fuel injectors, checked the
resistance on the ignition coils, and
everything was fine and working, but the
engine was still misfiring, so I erased the
codes on the computer and waited for the
"check engine light" to come back on so I
could scan the van again, and when I did,
the computer said it was the same ignition
coils as the last time I scanned the van
with the old coils. Either that is a big
coincidence, or it's something else with the
van. Then I thought, there's a fuse for
everything in a car, so maybe there is a
fuse for ignition coils and there was, so I
changed all the fuses that involved the
"ignition coils". And the van was still
misfiring. Does anyone have any idea what
the problem is with my van.