1978 Volvo 264 265
Possible cause
Correction
Intake system leaking.
Check vacuum hose connections at manifold and auxiliary air valve.
Exhaust Gas Recirculation Valve leaking.
Test the valve function.*
Spark plugs, high tension leads or distributor cap worn (defective).
Clean distributor cap and leads, check the cap for cracks. Replace defective or worn parts.
Worn spark plugs.
Remove. Clean or replace spark plugs.
Cold start injector leaking.
Test the injector function.*
Uneven compression.
Test compression.*
Condition: Engine stalls at irregular intervals Possible cause
Correction
Defective wires.
Check wire terminals at: fuel pump, fuse No. 7, coil, distributor, ignition switch and relays and air flow sensor.
Intake system leaking.
Check vacuum hose connections at manifold and auxiliary air valve.
Low idle speed.
Adjust.*
Exhaust Gas Recirculation Valve seizing. Replace valve.* (Engine will stall at idle.) Fuel filter clogged.
Clean fuel tank filter and replace line fuel filter.
pg. 78 Service diagnosis Condition: Low top speed, loss of power 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 file:///K|/ownersdocs/1978/1978_264_265/78264265_03c.htm (9 of 12)12/22/2006 10:12:13 PM