Stalling when engine is warm

1995 VOLVO 850
192,000 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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VICTORVOLVO
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Hi, my car starts right up no problem, but within ten to fifteen minutes and engine warms up it stalls out and will not restart until engine is completely cold.
I have taken it to repair shops to fix and it is still happening.
So far I have changed: fuel pump, fuel filter, crankshaft position sensor,and ignition coil.
Can anyone help?
Thanks
Apr 29, 2018 at 12:21 PM
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STRAILER
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Hello,

This sounds like the engine coolant temperature sensor is shorting out when it gets hot. Here is a guide to help show you what you are in for when doing the job:

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Here is the location for your car. Check out the diagrams (below).

Please let us know what happens.

Cheers, Ken
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May 1, 2018 at 10:51 AM
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VICTORVOLVO
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No, still have the problem. I changed the ECT sensor and thermostat and now it starts up but once it warms up and I shut it off it won't restart
Thanks
May 15, 2018 at 6:05 PM
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STRAILER
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Okay I am wondering if the main relay is heating up and failing. When the engine stalls do you loose spark or fuel? Can you hear the pump running in the tank still? and if yes lets check for spark. Here is a guide to show you how:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please check the fuel pump and the main system fuel relay for heat.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken
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May 17, 2018 at 10:01 AM