Vauxhall Workshop Service and Repair Manuals

Cold start (starting)

Warming up (stalling after cold starting)

Cold idle speed too high/too low

Cold driving characteristics/transition (pick-up poor, bucking)

Automatic choke cuts out incompletely or late

Warm start (starting time over 5 s)

Idle speed (uneven, too high, too slow)

Idle speed or CO content too high (cannot be adjusted)

Transition when accelerating (bucking)

Transition at high engine speeds (to 2nd stage)

Backfiring during engine braking

Performance (too low, missing at full load)

Fuel consumption too high

Cause

Remedy

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Choke valve does not close completely

Adjust choke/check bimetallic spring

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Choke valve or linkage sticks/catches

Free

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Choke valve gap incorrect

Adjust

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Pulldown leaks or defective

Check and replace parts if required

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Problems with choke heating, intake manifold preheater or thermostatic switch, coolant flow inconsistent

Check heating coil, thermostatic time valve an contacts: Check coolant flow

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Cam disc sticks: Incorrect position: Return springs defective

Free or adjust, replace carburettor cover if required

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Cold starting adjustment/throttle valve gap incorrect

Adjust fast idle speed/throttle valve gap

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Idle cut-off valve does not open

Check and replace if necessary

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Idle speed fuel/air jet dirty

Clean an repl. of necessary

Cold start (starting)

Warming up (stalling after cold starting)

Cold idle speed too high/too low

Cold driving characteristics/transition (pick-up poor, bucking)

Automatic choke cuts out incompletely or late

Warm start (starting time over 5 s)

Idle speed (uneven, too high, too slow)

Idle speed or CO content too high (cannot be adjusted)

Transition when accelerating (bucking)

Transition at high engine speeds (to 2nd stage)

Backfiring during engine braking

Performance (too low, missing at full load)

Fuel consumption too high

Cause

Remedy

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Fuel vapour escapes (engine mixture too rich)

Hold accelerator pedal fully depressed and start/try changing fuel type

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Injection quantity

Check and adjust if necessary

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Enrichment valve defective

Replace

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Float needle valve leaks

Clean valve and replace needle if required

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Float defective/level incorrect

Replace float

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Air leak at seal/flange

Repl.

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Throttle valves do not open fully

Correct accelerator operation

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2nd stage vacuum cell leaks

Replace

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Jets not acc. to specification

Replace jets

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Incorrect operation

Start as instructed

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Operating conditions

Measure consumption: discuss with customer