Question about Volvo 740

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My 1988 Volvo SOMETIMES doesn't start or stalls at traffic lights. If I pump the gas, tries to catch, but doesn't start. However, if I hold the gas pedal all the way down, then turn the key for 10-15 seconds, it sputters, catches, and starts. Dark gray smoke comes out the tailpipe. Later the car runs ok and the smoke disappears. This happens in cold and hot weather, rain or sun. The mechanics cannot find any reason for this or mechanical problems. Of course, the Volvo doesn't stall when it is at the garage....Any suggestions?

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  • asiafilm Apr 05, 2011

    I'm in the process of checking out all your suggestions...Thanks!


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I suggest clean and adjust the Throtle Body. If that doesn't do it, check all the rubber hoses. Its an old wives tale that everyone seems to follow. I have never seen a Volvo Fuel filter ever get clogged. They get changed every 30k miles for maintenance purposes. If all hoses are good and you clean the throtle body and still have issues, then the airmass meter may be giving you a problem.

Check if your Antilock light is on and the car is sluggish that is a classic case of a bad over-voltage protection relay. The relay provides power to the engine management system and to the ABS brake system. When the relay fails you have a hard time starting the car when cold and the ABS light comes on. The relay is located under the hood behind the battery. You'll need to remove the plastic shroud behind the battery to get to the relay. Check the fuses in the top of the relay first but if they are good just replace the relay. It will solve both of your problems.

Keep us updated.

Posted on Apr 02, 2011

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