Stalling when engine is warm

VICTORVOLVO

MEMBER
1995 VOLVO 850
2.4L
4 CYL
2WD
AUTOMATIC
192,000 MILES

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

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,861 POSTS

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

Images (Click to make bigger)

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Tuesday, May 1st, 2018 AT 10:51 AM

VICTORVOLVO

MEMBER
2 POSTS

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

Was this

answer

helpful?

Yes

No

Tuesday, May 15th, 2018 AT 6:05 PM

KEN L

MASTER CERTIFIED MECHANIC
42,861 POSTS

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

Images (Click to make bigger)