All Hybrid Racing throttle bodies are calibrated, sealed and locked before they are shipped to customers. Each unit is sealed and tested to ensure a leak-free butterfly. If you MUST adjust the idle set screw please understand this CAN affect how the car idles. If you are NOT using an IACV, this CAN result in idle surges.

Adjust the idle screw ONLY if you are NOT using an IACV.

If you ARE using the IACV and are experiencing idling issues, do NOT adjust this screw. Make sure your IACV is clean and spins freely when air is blown through it.

Loosen the locking nut on the throttle plate stop screw. These parts have thread lock on them.

Thread the throttle plate stop screw inward, to open the throttle plate. Once your desired idle has been achieved, apply thread lock and fully tighten the nut. Note that very SMALL adjustments can affect the idle in large ways.