GAoWEe

hey all my T2 running very bad

it wont rev past 6k and it shoots out 2feet of fire
out back.

i have no ideas whats wrong..i though it was the injector not comming online but i've check them and they seem to be working..before it backfire at a lower
rpm as the 2nd's injector come on..but now it got it to
rev pass that point.. i try alot of things already..
upgrade fuel pump/fuel filt. new injector, new ecu,
new spark plugand wire. i have no clue now..
its a rebuild motor that ran fine..for about 6k milez
then it started to backfire..after i took it to a shop to fix he told me the injector clip was broken on the backup injector so at 4k or so it wont come online and it runs lean..cause the back fire..after i got the clip replace it ran fine..then one day it started back up again..check check check and nothing..

also my ecu not giving me any error code.
when i unplug the cas nothing unplug the coil nothing
no code at all..only code i got was the air mass unit
could this be a ecu problem?? i replace it with a new ecu or should i say use ecu i got from a buddy car to test
and nothing....i'm all back up now..

can anyone help??