[s5 rx7] stalling while rolling and idling.

[Prof]

It has to be something to do with the secondary throttle removal - not sure how much you removed,  but these parts do the following jobs:
 
Secondary throttle plates - these are controlled by the wax thermo device - they prevent \'full throttle\' until the engine is warm.  The wax thermo is heated by the water pipe circuit
 
Wax Thermo Pellet - this retracts as the engine warms (coolant circulation) and controls the secondary throttle plate opening and also operates a cam that controls idle on the primary throttle - as the car heats up this cam retracts and the throttle closes more.  Once the car is warm the throttle has the minimum opening.
 
There\'s some vac lines you may have removed, and also - you\'ll need to block the holes that result from removal of the shaft the secondary plates sit on.

[GeenIdee]

Holes from the sec shaft are blocked.
 
And it did run good with this settup. That is the funny part.