Okay I have posted another thread saying engine will stall after start up. But since I bought the car from the customer I experience one heck of a scary moment. Well before I tried to diagnose the stalling problem after start up which wont start until 4-5 tires or let the key off for a few mins. That happened today after re-fueling. Then while coming back from dinner, driving on the highway around 60mph. Engine starts to feel jerky, like the vehicle is pulling back. So after a mile later, started to get worst, I lost control of the engine power cannot accelerate, vehicle is losing speeds. I put on hazards, pull over to the side of the road. And when at a complete stop, engine cut off. Took me two tries to get the engine fire up. And had to wait for traffic, while on the way home the 854 felt fine. No stalls.

This is the items I think might causing it:

Fuel Pump
Fuel Pump Relay
Battery cable? Postive (heard 850 postive cable is known to have defects)



I was going to drive it to work to diagnose it tommorow, but now is NO WAY!

btw no MIL, havnt check for DTC. Bought the car for 2200k at 122k miles.

 

Get A fuel Gauge and connect and drive around till it dies again and see if you loose fuel pressure.

 

OKay Finally hook up a fuel pressure gauge also a ignition tester. Test drove vehicle, good thing it stalled. Engine started to show its going to stall, so I kept my eye on the fuel pressure. Fuel pressure keeps dropping and finally at a complete stop. Igntion tester did not beep which means ignition is good but no fuel pressure at cranking.

So will just replace the Bosch Fuel Pump without fuel sender unit. Also will replace fuel pump relay.

 

Cool Glad you found it.

 

I got the same problem, stalls when making entrace onto highway from on ramps, also will not start up untill cranking sometimes 3 or 4 times and sometimes 5 minutes or more

 

When was the last tune-up?

See my 2nd reply at:
https://volvoforums.com/m_48928/tm.htm

Other popular culprits:

- Retiring fuel pump
- Retiring fuel pump relay
-Retiring Camshaft Position Sensor (CPS).
- Retiring Engine Coolant Temp (ECT) sensor
- Mass Air Flow (MAF) sensor

See attached,


JPN

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