Quote from Sparky on May 31, 2019, 9:29 am

After installing a 39610 trip power it fired right up  and ran about 1 min 1 1/2
Then all of a sudden the back throttle body started over fueling and spraying fuel all over
We shut it down and checked fault code and it gave us a P0204 
Tried a couple times again same results 
Called fitech they asked us to switch the injectors so we switched the wiring on the back throttle body and ended up same result 
We then unplugged the back throttle body and the center throttle body and plugged the back wiring harness into the center and the center wiring harness into the back throttle body 
This moved the problem to the center throttle body confirming that the problem must be in 
A) the wiring harness
B) the ecu
Not the throttle bodies as it happens with2 different throttle bodies
We then check continuity with an ohm meter and confirmed that the purple wire and the brown wire back to the ecu plug is fine and free of grounds
We then plugged a NOID light into the injector plug and can confirm the we have a pulsating voltage to it  it's seems as the the ecu is switching the injector 4 to quick and producing a flooding 

Anyone have a suggestion as to what to check next