Operation Manual

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1979 Volvo 242 244 245

Possible cause Correction

Air filter clogged. Check air filter.*

Throttle

misadjusted.

Check that the throttle touches the high speed stop when the accelerator is fully

depressed.*

Incorrect timing. Check and adjust.*

Fuel filter clogged. Clean fuel tank filter and replace fuel line filter.*

Condition: Excessive fuel consumption

Possible cause Correction

Fuel lines leaking. Check tightness.

Spark plugs worn. Replace plugs.

Incorrect timing. Check/adjust.*

Air filter clogged. Check/replace.*

Control pressure

incorrect.

Check/replace control pressure regulator.*

Cold start injector

leaking.

Replace injector.*

(A leaking cold start injector also causes uneven idle and hard

starting.)

* Should be checked by a Volvo dealer.

pg. 83 Service diagnosis

Condition: Dieseling

Possible cause Correction

Injector

leaking.

Check air flow sensor plate and rest pressure.*

Condition: Misfiring at highway driving speed

Possible cause Correction

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