Aftermarket throttle body/tuning question

[Funfettie]

Good evening,
So the car started after 18 months of building the other night. (never thought this day would come!) but anyways, Im having this issue where the car starts up right away, and idles nicely for about 10 seconds: then the wideband creeps from 14 to 24 and the engine kills.

So something is causing the engine to lean out. ECMlink is throwing a 120 TPS error code, but it reads the throttle position just fine. What could be causing this??

car is fully built, ready to push 600 to the wheels on E85. The car does have an aftermarket throttle body (ebay/godspeed 102mm(4")) and it has only the TPS on it. Could it maybe be something to do with not having all those other sensors?

the cars front o2 sensor wire on the ecu was spliced for the LC1 wideband. the car ran with both feeding the ecu with data, but i then unplugged the oem sensor to have just the wideband feeding the ecu with data, but the car ran the same. Any ideas? I heard it could be possible that the TPS shares a ground with the FIAV, this could be causing issues?

too many questions.. haha thanks guys and gals!
~Funfettie~

 

[thorclark]

Im having the same issue anyone know why?

 

[briank]

I find tps and injector circuit codes are typically a poor ground.