Conked out going down a hill in L3 - 2001 V70 Auto

  • Thread starter Thread starter Dransfield
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Dransfield

My V70 has behaved well up to now, but at the weekend I was going down a
very long hill (3 minutesish) and so put the car in Low3 to take some strain
off the brakes.

However when I got to the bottom of the hill and came to a stop at a
junction I found that the engine had stalled and there was a hot smell
coming from the car. I put it in park and it restarted, although had a lumpy
idle and took another attempt and some right foot to keep it going. Its been
fine since, and the smell went away.

Any ideas what happened, and if I did any damage?

Background info: Sometimes at traffic lights the engine stumbles but the
computer keeps it running. Also, sometimes when pulling up to lights I've
felt it 'push on' a bit and change down a gear, instead of coasting, but I
don't know if all automatics do this.

I was wondering if perhaps the computer didn't bother to keep it from
stalling in L3, so the engine stopped when the car stopped. Or perhaps it
stopped idling half way down the hill and the smell was a hot clutch where
it had been trying to turn a stalled engine. I noticed in the users manual
that you shouldn't bump start the car as this will damage the catalytic
converter - no idea why - but perhaps this was what the smell was.

TIA
Dransfield
 
Dransfield said:
My V70 has behaved well up to now, but at the weekend I was going down a
very long hill (3 minutesish) and so put the car in Low3 to take some strain
off the brakes.

However when I got to the bottom of the hill and came to a stop at a
junction I found that the engine had stalled and there was a hot smell
coming from the car. I put it in park and it restarted, although had a lumpy
idle and took another attempt and some right foot to keep it going. Its been
fine since, and the smell went away.

Any ideas what happened, and if I did any damage?
Click to expand...

The smell is the hot transmission fluid. It gets hot when the
transmission is working either accelerating or decelerating. I live on
a 500' hill and after I climb the hill to my home, the transmission
always smelled hot in all my Volvos. I doubt if it hurt anything.
Background info: Sometimes at traffic lights the engine stumbles but the
computer keeps it running.
Click to expand...

This is a different problem which is under warranty. I had the same
problem and the 155 Service fixed it for me. There is a "service
campaign" for the electronic throttle system (ETS) and electronic
throttle module (ETM) where they actually put in a new program that
ignores errors by the ETM. If they need to replace the ETM, it covers
that. It is not techically a recall, but "VSC 155 service campaign".

Here is what the campaign covers:

"Electronic Throttle Module (ETM) failure may illuminate Electronic
Throttle System (ETS) light or MIL. Symptoms may include, uneven engine
idle, and/or "limp home mode" that could restrict vehicle speed to 10-30
miles per hour. Faults of the ETM are stored as DTCs in the ECM. If OBD
II detects a fault that might increase emissions, the MIL is
illuminated. Remedy: A software upgrade will be performed at the next
service interval, and ETM warranty extended to 10 years or 200,000
miles, whichever comes first."

It basically covers S70, V70, V70 XC, C70, S80, and S60 from 1999 to
2002.

For more information check page 2 of:

http://www.epa.gov/otaq/cert/recall/2006recallreport4.pdf
 
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