1990 Volvo 740 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1990 Volvo 740

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Engine stalling/stumbling problems can be caused by a failing mass airflow sensor.

A faulty RPM sensor can cause the Check Engine Light to come on and cause a "No Start" condition.

The fuel pump relay may fail resulting in a "no start" condition, the engine will crank over but will not start and run. Checking for proper fuel pressure would be the first step in diagnosing this concern.

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Replaced upper radiator coolant hose before I did this. Actual year is 1988. Had been sitting for awhile (1.5 years) before I started working on it. Fuel pumps work fine. Fuel lines look in good condition, no leaking, no rusting. Coolant temp sensor has not been replaced before, as well as fuel p...

needs to cool down to start

could this be vac leaks or is it map,o2,sensor related? fuel pressure? also will occasionally buck while driving at interstate spd. there is no check engine light on also the speedo has become erratic and the anti lock light is coming on after hitting a bump and now stays on longer/more often

See More Questions 33

SAFETY BELTS ARE DESIGNED TO BE ROUTED UNDER A DIAGONAL CROSS BRACE DURING FASTENING. THE INSTRUCTIONAL LABELS FOR THE BELT ROUTING ARE INADEQUATE, AND CAN RESULT IN INADVERTANT RELEASE OF THE BELT BUCKLE.FUEL DAMPER LOCATED BEHIND THE FUEL LINE AND THE FUEL RAIL MAY BE IMPROPERLY ASSEMBLED. OVER TIME, THE SOLDER JOINTS COULD ALLOW A SMALL AMOUNT OF FUEL TO LEAK.

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