Has anyone run across a P2135 with a GM Performance E-Rod Crate motor. Fundamentally it is an E67 LS3.
I have had an intermittent issue with the engine starting and immediately dying. Usually it will eventually run fine.
I have tuned the engine and it runs great except for the intermittent running condition. It is throwing code P2135 Throttle Position (TP) 1-2 Correlation.

I have tested continuity for pins D,E,F&G (5 volt reference, Low Reference and Signals for TP Sensor 1 and 2) and they are fine.
I have changed the Throttle Body and still have the codes and start then immediately die condition.