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.
Air Intake System Operation
Air intake system on 3.0L engine incorporates throttle body and intake manifold in one-piece unit. All other engines use 2-piece (upper and lower) intake manifolds. Runner lengths are tuned for optimum engine torque output. Manifold provides mounting flanges for throttle body assembly, fuel supply manifold, accelerator controls, EGR valve and supply tube.
Vacuum taps are provided to support various engine accessories. Pockets for fuel injectors are machined to prevent both air and fuel leakage. Pockets in which injectors are mounted are placed so injectors spray fuel directly in front of each intake valve.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.