940 Turbo stalls randomly while driving
#1
940 Turbo stalls randomly while driving
Started happening few days ago. Has happened 6 times now. Conditions have been: driving 20-30 mph and beginning to slow (not necessarily braking). All but 1 time was slowing, via coast, uphill (that 1 time was coasting downhill).
The dash goes dark only momentarily before illuminating again (as if key were turned on for accessories but not as far as ignition). I put the car in park and it starts with no issue.
I figure it must be bad wiring somewhere. First thing I checked was the battery connections - all solid with no wiggle/play in them. Given that the car starts fine, I'd rule out starter wiring.
I found no obvious visual indication of cracks, frays, etc. to wiring to alternator or distributor.
Experienced this before? Recommendations for next steps?
Model year = 1995
The dash goes dark only momentarily before illuminating again (as if key were turned on for accessories but not as far as ignition). I put the car in park and it starts with no issue.
I figure it must be bad wiring somewhere. First thing I checked was the battery connections - all solid with no wiggle/play in them. Given that the car starts fine, I'd rule out starter wiring.
I found no obvious visual indication of cracks, frays, etc. to wiring to alternator or distributor.
Experienced this before? Recommendations for next steps?
Model year = 1995
Last edited by 940newb; 05-14-2019 at 12:15 PM. Reason: add vehicle year
#4
#6
#9
Clean and re-seat all grounds, even if they seem unrelated. I had a problem where when I switched from low to high beams on the headlights the motor would cut out for a split second (1992 740).
I unseated all the grounds up by the headlights, cleaned the tabs, then reseated them. Problem solved.
I unseated all the grounds up by the headlights, cleaned the tabs, then reseated them. Problem solved.
#10
Finally changed the fuel relay 3 days ago. (our volvo parts specialist friends in Oregon provided the wrong part number. ended up having to place a second order with a different vendor)
Drove mostly on the highway since, without issue. This morning the car stalled again. Arrgh!
I will re-seat grounds as suggested above when I can get to it.
Thanks to all who have provided potential solutions.
Drove mostly on the highway since, without issue. This morning the car stalled again. Arrgh!
I will re-seat grounds as suggested above when I can get to it.
Thanks to all who have provided potential solutions.
#11
I have finally changed the fuel relay - go the wrong part number from our friendly supplier in OR and had to order elsewhere.
Got by with couple days of driving before stalling again - same conditions: slowing from ~30 mph on a change of grade - flat to uphill or cresting a hill.
I have checked the major ground connections - though need to check those of headlights per dnarby.
The car has on a few occasions started to stall but actually didn't. During these the "check engine" light glows momentarily then all is fine.
While under the hood I noticed a few vacuum line could use replacement. Could ratty vacuum cause this under the conditions described?
ps - car has 175,000 miles
Got by with couple days of driving before stalling again - same conditions: slowing from ~30 mph on a change of grade - flat to uphill or cresting a hill.
I have checked the major ground connections - though need to check those of headlights per dnarby.
The car has on a few occasions started to stall but actually didn't. During these the "check engine" light glows momentarily then all is fine.
While under the hood I noticed a few vacuum line could use replacement. Could ratty vacuum cause this under the conditions described?
ps - car has 175,000 miles
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Suzyq
Volvo 240, 740 & 940
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07-07-2018 04:53 PM