Question about Volvo 240

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I have a 1991 Volvo 240 wagon that intermediately shuts off while driving. When it does shut off the lights on the dash turn on(don't know if that piece of info means anything). Also most of the time when I try to crank it back up immediately after I pull over it takes a while before it wants to run again. Anyways the funniest thing about it to me is that it runs good like a champ-until it shuts off at random. I've checked some of the fuses that where underneath the dash at the drivers side door-they looked good, and I haven't been able to figure out where the fuel pump relay is on the vehicle but I'm guessing that it's in fair condition. The fuel filter has been replaced but the pumps have not been replaced. I've also thought about checking some of the ignition system components but i don't know if that would help with diagnosing the problem. My first question is that: Is there a solution to the intermediate shutting off that will fix that problem for good? My second question is that: Is the problem some where in the Fuel System, In the Ignition System, Or Both?

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Sometimes the wires that go to the dist behind the cylinder head break loose from dist and short out on dist body. also there is a single fuse on left[as viewed from drivers seat] inner fender near the top. its in a holder with a rubber cap over it. the fuse holder gets hot and the connections in it melt and cause problems loke yours. if you pull the fuse and see heat damage sut out the fuse holder and splice in a new one.make sure the replacement has the same guage of wire or bigger on it.

Posted on Sep 11, 2010

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The fuel pump relay is a good bet. Many old Volvo owners carry a spare fuel pump relay in the glove box because it is not uncommon for them to fail.
I and another guy disagreed the other day on the easiest way to access the relay. He says it is easier to remove the glove box. I thought it was easier to drop the felt liner below the dash and lay on my back on the floor and reach up. Either way works.

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Ermm...do take your car to a mechanic and check if the fuel pumps are runnin efficiently...lack of and inconsistent fuel supply to the engines may lead to your engine dying as you drive..i'm sure this is observed especially in cold mornings..i had that problem too but now after getting it replaced...its ok

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Had the exact same problem with my 240 wagon. There is a temperature sensor up near the manifold on the drivers side of the engine. This is not the temp sensor that feeds the dash gauge, but one that tells the engine control module whether you are starting hot or cold. Mine was cracked, so the engine computer would get a cold start signal even after the engine ran warm, and would flood. This can be a difficult problem to diagnose and an expensive one when mechanics start swapping parts. You cannot see this sensor, but you can feel it (when the block is cold, please) right under the exhaust manifiold. A replacement is about $80 plus labor. Even my very experienced Volvo mechanic overlooked it. But the car would start and run fine, then leave me stuck when I tried to restart it. After calling AAA for a tow, the temp sensor would reset, then the car would start normally. Cheers. The 240 is a great car - I ran mine up to 235,000 miles; now I have a 740 with the same engine.

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