Primary Use

Direct Injection Air Intake System & Valve Cleaner is a two-step solvent-based cleaning formulation, specifically designed to dissolve the contaminants that accumulate in the air system, and more specifically to soften and loosen the caked-on deposits on the intake manifold side of the intake valves.

Key Features

  • The introduction of the Direct Injection fuel management system in vehicles provides for noticeable improvements in fuel economy and a significant reduction of emissions released into the atmosphere.
  • The accumulation of contaminants (wax, varnish and dirt) within the air intake system can restrict air and fuel flow and the collection of deposits on sensors can cause engine malfunctions, including erratic idle, minor hesitation and stumbling as well as startability problems.

Directions for Use

  • Attach the can labelled Step One to Direct Injection cleaning application tool.
  • To access the air throttle valve and the idle air control valve and deliver cleaning fluid to dissolve the viscous contaminants in the intake manifold and, most importantly, deliver the cleaner to dissolve the hard build-up of contaminants on the back of the air intake valve, idle engine until normal operating temperature is reached, disconnect the air tube from the end of the air intake manifold.
  • Insert “S” nozzle into the throttle body and reattach air duct. Increase idle to 1200-1500 RPM.
  • Spray directly into the throttle body until can is empty.
  • DO NOT allow engine to stall as restarting may be difficult.
  • When can is empty, turn off engine and let sit for 5 minutes.
  • Restart engine, then rev engine several times to ensure all remaining chemical is passed through the combustion chamber.
  • Repeat with the can labelled Step Two.
  • Excess product may be absorbed with a shop towel.
  • Idle air control valves may require removal to facilitate cleaning.
  • The air intake system should be cleaned whenever it is serviced.


1. Is it oxygen sensor and catalytic converter safe?

Yes, there are no components that will cause harm to the sensor and converter.

2. Is any special tool required?

Yes, an application tool is required to apply the product to the intake manifold vacuum source.

3. Can it be used on any engine?

No, it is intended for direct injection gasoline engines.

4. Do both products need to be used?

Yes, for best results both products should be used in the correct order.

Why Shrader?

Shrader line up of products have been trusted by professionals for over 60 years. With the largest OEM approved formulation line up of products in Canada, our formulations have been designed to exceed industry standards. Shrader products regularly outperform the competition in independent lab and field testing. This product is a 2-step kit in pressurized cans and provides good atomization of the product.


Sign up to receive email news and updates.

We respect your privacy