Volvo DL 1981 Owner Manual

pg. 87 Service diagnosis, Page 108 of 127 pages for Volvo DL 1981 Owner Manual. The Owner Manual is applied into the following products: GL 1981, GT 1981

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1981 Volvo DL, GL and GLT 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. 87 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 Spark plugs fouled. Drive the vehicle in a lower gear and keep the engine rpm higher for a few miles in order to remove carbon deposit on the spark plugs. If this procedure is not effective, clean or replace the spark plugs. * Should be checked by a Volvo dealer. file:///K|/ownersdocs/1981/81_dl_gl_glt/81DLGLGLT_03c.htm (10 of 12)12/22/2006 10:28:44 PM

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