Replace your air Intake boot to repair engine hesitation, stumble, hard starting high and low idle

The air intake boot is used to connect the air filter and mass air flow sensor to the intake tube and throttle actuator. This rubber like part is attached using simple hose clamps. Replacing the boot takes about 15 minuets using everyday tools and can save you enough money by doing it yourself instead of having it done at a repair shop to have a nice diner with a friend.

The boot is usually made of flexible rubber and over time, vibrations within the engine coupled with natural degradation of the rubber can cause small cracks which allow air to be pulled into the engine that was not filtered nor accounted for. This unmetered air can cause extended crank time, hesitation, poor gas mileage, high or low engine idle not to mention a check engine light.

Please watch the video and follow the guide below, when finished pick up on information and tips you may have missed in the video by reading the following guide.


Thanks for watching I hoped you enjoyed it, now continue down the guide to gain additional information that can help you do it yourself, though appearances may vary, the process is the same on most vehicles. 

Tools and Supplies Needed

  • Replacement air intake boot
  • Basic tools

Begin with the car on level ground, engine off, in park with the parking brake set.

Step 1

Loosen and remove the clamps that secure the boot to the air cleaner housing and the throttle body. This can be done using a screwdriver or a small socket and ratchet and turning the clamp screws counterclockwise.

Removing Clamps

Step 2

Breather tubes may be connected to the boot which are used to vent the engine crankcase gases into the intake system to be re-consumed by the engine combustion process. These tubes are held in place by a plastic clip, use a small screwdriver or pick to dislodge the fastener which will enable you to remove the tube.

Remove Engine Breather Tube

Step 3

Sometimes the boot can be stuck on the intake tube or air cleaner housing do to heat from the engine and pressure of the clamp. Use a screwdriver or pick to help break the seal and while use a twisting motion help loosen the seal to dislodge the boot.

Disconnecting Air Filter Housing

Step 4

Once the mounting clamps and breather hoses are removed and loosened, completely remove the boot. Inspect the area between the ribs by flexing it and looking for signs of rips or tears, if these imperfection are found replacement is required. Keep track of all clamps, nuts and bolts in a container so they don't get misplaced.

Boot Removed

Step 5

Match the new boot to the old unit, they should match up identically, reinstall mounting clamps onto intake new boot, take note of the clamps orientation which will make installation much easier.

Installing Clamps

Step 6

While holding the new boot firmly with one hand and making sure the clamps do not fall off with the other, reinstall the new air intake boot onto the throttle actuator first. Be sure not to get any dirt into the area during the installation process.

Reinstallation

Step 7

Finish installing air intake boot by fitting the boot end onto the air filter housing or mass air flow sensor depending and tightening the clamps snugly, do not over tighten. Start the engine and listen for any vacuum leaks or hissing sounds which would be an indication of the boot lip being folded under somewhere either on the throttle actuator or the air filter housing.

Completing the Installation
This is what a failed parts looks like which occurs more on older cars with high mileage.

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