Vanagon F4-1970cc 2.0L (1982)
Throttle Full Open Switch: Testing and Inspection
Full Throttle Enrichment, Checking
Checking Full Throttle Enrichment
Note: This check shows possible defects in control unit or break in wiring between control unit and full throttle switch. At full throttle, this switch
signals control unit to increase amount of fuel injected
California only: Vehicles for California are equipped with speed limit switch located between full throttle enrichment switch and control unit. Full
throttle enrichment will take place when engine runs above 3000 rpm (at same time oxygen sensor switches off)
Preconditions:
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Warm engine until oil temperature is at least 60°C (140°F)
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Check that idle speed, CO, and ignition timing are OK
California only
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Use jumper wire and make contact between terminal 4 and 8 (arrow A) of connector for speed limit switch
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Pull off connectors for idle stabilizer and connect together (arrow B)
Work sequence
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Run engine at idle and adjust to specifications in table
California, all 850 - 950 rpm
USA & Canada w/ Automatic 850 - 1000 rpm
USA & Canada w/ Manual 800 - 950 rpm
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Operate full throttle switch by hand
Idle speed must increase approx. 100 rpm
If NO, check full throttle switch and adjustment position
If full throttle switch is OK, replace control unit or wiring between control unit and switch
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On Calif. vehicles readjust idle speed to specifications on sticker and reconnect idle stabilizer
