Engine - Poor Performance, Hesitation, or Surge

9235vw01

Group: 24

Number: 92-02

Date: April 30, 1992


Subject:
Vanagon Driveability Complaints

Model(s):
Supersedes Technical Bulletin 92-01
All Water Cooled Engine Vanagons


Condition

After driving for an extended period of time at a constant speed, the vehicle may, on occasion, experience a deterioration of performance which may be accompanied by a hesitation or surging.

In many cases, after turning off the engine and subsequent re-start or without having taken any action, the symptoms disappear. These symptoms may not re-occur for several weeks or months.

Service

To resolve this condition, wire harness Part No. 025 906 302, should be installed. This harness provides improved signal voltage stabilization.

^ remove electrical connector from air flow sensor

^ install wire harness, Part No. 025 906 302, between main harness connector and air flow sensor connector


CAUTION
Part numbers are for reference only. Always check with your Parts Department for latest parts information.


Note

When troubleshooting this system and Performing continuity checks, the following should be noted. Due to active components in the wire harness, Part No. 025 906 302, there is no continuity between pin two of the connectors. The following chart on page 2 lists the resistance of each circuit.


Terminal Approximate
Number Resistance

1 Zero Ohms (0 ohms)
2 Greater than 1 Meg. ohms
3 Zero Ohms (0 ohms)
4 Zero Ohms (0 ohms)
5 Zero Ohms (0 ohms)


Note

If customer complaints persist after performing the above repair, contact your Zone Product Support Specialist for assistance.