Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Throttle Opener System
The system is made up of a servo diaphragm connected to primary throttle valve, and a vacuum control valve, which is located between the intake manifold and servo diaphragm. Throttle opener system uses intake manifold vacuum during deceleration to slightly open primary throttle valve. Primary throttle is held open until engine slows to 1400 RPM (1800 & 616), 1300 RPM (1200) or 1200 RPM (808).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.