volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Fuel Control System - Checking, Removal and Installation|Page 922 > < Fuel Control System - Checking, Removal and Installation
Page 2
background image

-

adjust position of sensor plate by bending wire clip (arrow)

CAUTION

Do not scratch venturi of air flow sensor. Do not bend leaf spring..

Air flow sensor plate free play, checking

Note Free play is noted between control plunger and sensor plate lever (right arrow). It is measured on side of air flow sensor facing fuel distributor (left
arrow).

Test conditions
^

4-16 mA differential pressure regulator current

^

conforms to basic adjustment of sensor plate lever

Work sequence

-

actuate starter or remote control US 4480/3 for approx. 10 seconds to energize fuel pump

-

slightly lift air flow sensor until resistance is felt

^

minimum clearance: feeling play

^

maximum clearance: up to venturi cone 2 mm (0.078 in.)

If clearance is NOT OK:
-

remove fuel distributor

-

perform Sensor plate lever, basic adjustment

-

perform Sensor plate clearance, adjusting with control plunger stop screw

-

reinstall fuel distributor and repeat clearance, check

Adjusting free play on fuel distributor

Fuel Control System - Checking, Removal and Installation|Page 922 > < Fuel Control System - Checking, Removal and Installation