Engine - Induction System Testing/Equipment

Engine - Induction System Testing/Equipment

SI M 11 04 07

Engine

August 2007

Technical Service

This Service Information bulletin supersedes S.I. M11 04 07 dated May 2007.

[NEW] designates changes to this revision

SUBJECT

Testing Induction Systems Using the VACUTEC(R) Smoke Machine

MODEL

All Models

SITUATION

Testing induction systems for vacuum leaks is very difficult at times.

This Service Information Bulletin is designed to express some testing hints to help simplify the process.

First, determine if the vehicle has a condition where the induction system could be leaking. Does the vehicle have adaptation faults? Does the vehicle

have oxygen sensor trimming faults? What are the adaptation values; are they positive or negative?

In cases where the adaptations indicate a lean condition (positive value), a smoke machine is a helpful tool in determining if the induction system has

a leak.

Recently, the VACUTEC(R) Smoke Machine [NEW] 625-522B has been added to the Equipment Program. Orders for the new machine can be

placed by calling 1 888 222 7997.

Included with the new VACUTEC(R) smoke machine are various caps and adaptors to help connect the applicator hose to the vehicle. It is always

suggested to not disturb the system before testing. Try to make as little disturbance as possible to the system when connecting the smoke machine.

This smoke machine utilizes an UltraTraceUV(R) smoke solution. The smoke solution incorporates an ultraviolet dye that helps pinpoint the leak

with an ultraviolet residue surrounding the leak area. Determining the source of the leak is made easy when the included Hi-Density True UV LED