TS Performance 8210101 - Manual (Page 4)

The ISX and QSX fuel system assembly is located on the
intake side of the engine. There are four actuators that
control the timing and fuel delivery. The two fueling
actuators are where the TS Performance power module
monitors these actuators and adds fuel economy and
horsepower by optimizing the duration of fuel to each
injector.
Installation Overview
3
Troubleshooting
12
4. Be sure the TS Performance fuel module
connectors are plugged into the two outside
FUELING ACTUATORS.
5. ***DO NOT plug the fueling module into the
MIDDLE actuators, these are the TIMING
actuators and will have adverse effects on
your engine performance.***