Ecotech Sand Rail starts and runs fine except idle surges after idling for about 30 seconds. WOT is great. eee datalog is a wide open throttle acceleration run. Fuel system is all new with 58psi pressure and clean filter. Engine is new including all sensors. Throttle body is spotlessly clean. Zero vacuum leaks and header gaskets are new.
Speed density due to this is in a sand rail and don't want to constantly cleaning it on dunes.
Suggestions??