nickm
Okay this just started. It is running fine no miss and good power.
Warm or cold in the first minute of driving after being shut down the car will stall. Happens generally once and starts back up straight away. And runs fine after that.
Can't make it do it at idle and it does not throw a code. So I'm at a loss to be able to diagnose what is happening. All that happens is the check and trans light flash on.
Does the ECU check something at that point? I'm thinking cam sensor or some transmission thing but don't want to throw parts at it.
Any ideas?
Ex850R
Swap an ecu into it to be sure?
nickm
I don't have a spare.
Do you know if there is some diagnostic that is run by the ECU or transmission at that point?
Ex850R
Early fail of the MAF?
Unplug MAF and see if it does it?
Ecu stuff is beyond me bloke.
nickm
I think it is a speed sensor issue or something like that.
I did have an issue of the trans dropping into winter mode a couple of times before this.
But I suspected the sport/econ winter switch.
Now I'm thinking is along these lines.
Possibly a wiring issue around the crank sensor or cam sensor loom plugs.
Just need to figure if the trans has an extra sensor...seems to according to the manuals. Or if one is shared.
Ex850R
The wiring on P80 sure is crap... All the plugs and sockets are toast once you Unplug them it seems. I had a bloody efan one fail, car getting hot, damn. Had gaffer tape...
nickm
Okay seems I have some progress.
If I put the car in L or 3 and run for the first couple of minutes it does not stall.
Would the PNP cause this?
jamesinc
From what I know of the PNP switch, it is this magical beast that ruins your car in all sorts of unexpected ways, so I'd definitely start there (either replace or clean it and re-grease the contacts).
familyman
I have no experience with 850s but I knew an old couple that owned one. It would stall soon after starting. Power steering go offline of course, so they'd barely get it to the side of the road, restart it, drive off again the rest of the day. They paid something over $300 to Volvo who (didn't) fix it. It did it again the next day. I think Volvo finally realised it was the ignition switch behind the key. Hit a bump in the road a certain way, and off it would go.
nickm
thanks 90% sure is it coming from the transmission.
When I solve it I'll post my solution.