Intake System, Checking For Leaks (False Air)

Intake System, Checking For Leaks (False Air)

Special tools and equipment







- VAS5051 Vehicle diagnosis, testing and information system with VAS5051/1 Adapter
- Engine leak detection spray G 001 800 A1

NOTE:
- Vacuum in the intake system sucks in the leak detection spray with false air. Leak detection spray decreases ignition quality of the fuel mixture. This causes a reduction in engine speed and a sharp increase of CO content.
- It is absolutely necessary to follow the safety precautions listed on the can.

Work sequence
- Connect VAS5051 tester, Vehicle Diagnostic, Testing and Information System VAS 5051, Connecting and Selecting Functions and select vehicle system "01 - Engine electronics". Engine must run at idle.







Display on VAS5051:
- Select diagnostic function "08 - read measured value block" in selection -1-.







Display on VAS5051:
1 - Enter display group. Max. input value = 255
- Select function "001" in button field -2- for "display group number 001" and press Q button to confirm input.







Display on VAS5051:
- Make note of engine speed in display field 1.
- Spray intake system parts with engine leak detection spray in a systematic manner.

If engine speed decreases:
- Check sprayed part of intake system for leaks, and repair.
- Press <- button to end function "08 - Read measuring value block".







Display on VAS5051:
- Select diagnostic function "06 - end output" in selection -1-.
- Switch ignition off.