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> Volvo S40 Runs For About An Hour Then Dies
pawright
post Nov 11 2016, 07:22 AM
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hi i am having problems with our s40 it runs fine for about an hour then it seems to run rich, won't rev out properly and then dies. if we let it sit for about an hour then it all works fine again. not sure if it is heat related the thermo fans seem to work sometimes and then not others it could just be that it isn't that hot the temp gauge always sits somewhere around a quarter.
has anyone had this problem and then found a solution?

we are in northern nsw so the ambient temp at the moment is usually around 30 degrees
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grendel1960
post Nov 11 2016, 07:33 AM
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similar problems in the past have been caused by cracks in the solder on the fuel pump relays, the heat makes the cracks open up and lose connection, once you stop it cools a bit an remakes the connection. so I would suggest a new relay (or reflow the solder connections on the current one) - and carrying a spare fuel pump relay.
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pawright
post Nov 11 2016, 02:44 PM
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QUOTE (grendel1960 @ Nov 11 2016, 08:33 AM)
similar problems in the past have been caused by cracks in the solder on the fuel pump relays, the heat makes the cracks open up and lose connection, once you stop it cools a bit an remakes the connection. so I would suggest a new relay (or reflow the solder connections on the current one) - and carrying a spare fuel pump relay.



can you tell me where the relay is located?
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grendel1960
post Nov 12 2016, 06:56 AM
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it should be with the rest of the relays behind the cover just behind the air box, there should be a list inside the cover to tell you which one.
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