Ignition - Data, Timing Specifications and Adjusting

86VW3

Applies To VANAGON


1986
Group


28
Subject

Digifant system


Part Identifier N/A
Key Points

Ignition data, Ignition timing and adjusting

A 211
Number

86-01

January 25, 1986



Ignition data, ignition timing and adjusting
CAUTION Part numbers are for reference only. Always check with your parts department for latest part information.
Ignition timing, checking

Requirements

^ engine oil temp. minimum 80~C (176~F)

FIGURE 1 - CONNECTING TEST EQUIPMENT:

- connect test equipment for ignition timing and rpm as shown in 28-642

WARNING

Ignition must be switched off when connecting ignition timing tester and rpm display.

- start engine and allow to idle

FIGURE 2 - TEMPERATURE SENSOR II:

- disconnect temperature sensor II
- raise engine speed to 2000-2500 rpm
- record timing value displayed on tester

- reconnect temperature sensor II
- raise engine speed to 3000 rpm
- read timing on tester, subtract recorded value from this reading
^ calculated value must be 35~ +/- 5~
If NO
- check electrical connections for temperature sensor II, air flow sensor and digifant control unit according to wiring diagrams

FIGURE 1 - CONNECTING TEST EQUIPMENT:

Ignition timing, adjusting

Requirements:

^ Engine oil temp. minimum 80~C (176~F)
- connect test equipment for ignition timing and rpm (see Fig. 1)

Note

Use adapter VW 1473 for connecting tester VW 1367 to terminal 1 of ignition coil.

FIGURE 2 - TEMPERATURE SENSOR II:

- start engine and allow to idle
- disconnect temperature sensor II (see Fig. 2)
- check ignition timing at 2000 - 2500 rpm correct if necessary
Adjustment with TDC marker

Ignition timing is displayed directly on tester Specifications:
^ checking value 3~ - 7~ BTDC
^ adjusting value 5~ +/- 1 BTDC

Adjustment with timing light

Notch on V-belt pulley must match separating line on crankcase
- correct idle setting if necessary