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How to Clean Intake Manifold

How to Clean Intake Manifold

Carbon is fantastic as the building block of all life on the planet, but not so much in your engine. Interestingly, the carbon layers in your engine derive from prior life on Earth, namely the fossils you’re burning to keep the vehicle going.

Maybe it’s fitting that a few of them cling on your intake for a little while before being dragged into the whirlpool of combustion. However, sympathy aside, they have an uncanny ability to clog air passageways and waste horsepower.

  1. Identify the suction pipe that connects the intake manifold to a brake master cylinder booster. You can check the suction hose from booster to an engine for junctions or sensors. Remove the vacuum cleaner hose from brake booster or even the hose’s intake side.
  2.  Attach one side of the vacuum pump adapter to a vacuum hose that just disconnected, and the other end to a 18w piece of half – inch vacuum line. Fill your plastic container or glass jar halfway with engine cleaner, around 8 ounces (about half a regular can). Into the bottle, insert the other side of the 1/4-inch-high pressure hose.
  3. Begin the vehicle with your assistant. Because you’ve exposed a large vacuum leak, expect this to start as well as idle poorly. Keep the throttle at 2,000 rpm or less, depending on your assistant.
  4. Begin by dipping the tube into engine cleaner lightly so that the engine only takes small “sips” every 2 seconds or so. The engine will begin to bog down, and black or dark smoke will begin to erupt from the exhaust. Don’t panic; this is entirely normal and won’t harm the engine. This is just due to the engine running too rich and not entirely burning the cleaner.
  5. Continue doing so until the bottom of the bottle contains around 1 ounce of liquid. It should just take about a moment to accomplish.Until you’re down to its last inch, fully immerse the tube for 3 seconds, and have your assistant turn off the motor if that doesn’t stall while pulling in the last slug of cleaner. Don’t get too worked up. It’s common to see people stuttering in this town.
  6. Allow the cleaner at least 30 minutes to break down on carbon deposits. Fill the bottle halfway with the remaining cleaning from the can. Restart the engine and repeat steps 3–6 until the cleaning in the bottle is completely gone. After disconnecting the vacuum line from the adapter, reconnect it to the brake booster.Fill the gas tank halfway with the second can of cleaner, then top it off with “Top Tier” gasoline.


Park your automobile in a shaded, well-ventilated spot before beginning the process, not even in a remote place. To protect yourself, put on the work gloves and face mask. Because the throttle is also connected to the air intake, you may need to wipe that out as well.

Step 1: Make sure your car is parked in the well place so that exhaust fumes do not suffocate you or others.

Step 2: Detach its intake air tube from throttle once the engine is turned off.

Step 3: Spray power soap onto the clutch plate to clean it.

Step 4: Wipe the throttle plate and any other spots with excess liquid with a clean cloth.

Step 5: Reattach the throttle to the air intake duct.

Step 6: Disconnect the intake manifold’s vacuum hose.

Step 7: After starting the automobile, let it idle for several minutes.

Step 8: Pour half the can of power foam into vacuum line while the automobile is running at a high speed.

Step 9: Turn off the motor and wait about five minutes for the spray foam to dry.

Step 10: Return the vacuum hose to the intake manifold

Materials & Equipment

  • screwdriver with a flat tip
  • Plating (10mm, 12mm 14mm)
  • Ratchet
  • Wrench to torque
  • Lubricant
  • Body cleanser with anaccelerator
  • rag/towel
  • Pipe brushes or Q-tips
  • Brush with nylon
  • Pliers
  • Automobile instruction book
  • Disconnect the runner control from the intake manifold

Unplug the automobile battery before removing the manifolds runner cover to avoid electrocution while working on the engine. Because the manifold runner is now found in different places on most cars, it is critical to consult the owner’s handbook. Pry the upper half of a manifold runner open with a flathead screwdriver after you’ve found it. Remove the 10mm bolt with a torque wrench to completely expose the interior of a intake manifold runner control.

  • Disconnect the tubing which connect the manifold runners to the car engine

Pull off the intake air tubing from the manifold runner gently. Remove any other tubes attached to the manifold runner. After you’ve cleaned the manifold runner control, make a mental note of which tubes go where because you’ll be reinstalling everything.

  • Remove the Manifold Runner Control’s Body

Carefully remove the air intake runner control once it is free of any attachments by pulling the top of a manifold apart first. To avoid harming the steel gasket that sits just on bottom of the manifold, you must proceed with caution.

  • Using an Injector Cleaner, clean the manifold runner.

Use a rag to apply a generous amount of throttle body cleaner to the manifold control runner. Clean the manifold run control with a nylon toothbrush to get rid of the obstinate dirt that has become stuck in every nook and crevice. To clean the little holes on the manifold runner, use Q-tips or a pipe brush. Apply lubrication to the surface after everything is clean.

  • Reinstalling everything

Retrace your steps in the other direction to restore everything. Before reconnecting the automobile battery, double-check that the intake air runner control is secure by tightening the bolt properly.