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No start problem & separate rough idle

Help, Advice, Owners' Discussion and DIY Tutorials on all Volvo's "mid era" rear wheel drive Volvos.

1975 - 1993 240
1983 - 1992 740
1982 - 1991 760
1986 - 1991 780
1990 - 1998 940
1990 - 1998 960
1997 - 1998 V90/S90

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blynx
Posts: 3
Joined: 27 November 2012
Year and Model: 740, 1991
Location: United States

No start problem & separate rough idle

Post by blynx »

When turning the key to 2nd position everything is fine, all lights work, no problems eminent. However, (at random) while turning the key to crank, the car will immediately shut off and it seems no power is getting anywhere to the car. Nothing electronic works (lights, etc.). Power is restored after a couple of minutes or if i take off a battery connector and reattach it. Is this a candidate for a grounding problem for the battery cable or something completely different? It feels like there is a cut off from the electricity as if there is too much Volts. I measured the battery while the car is off on a multimeter and it rates the battery at 12.57v.

The 2nd problem that i have is when at idle at low fuel reservoir(10% or less), the idle becomes more rough than normal. The idle is much more smooth after a refill and lets me assume that problem lies with either the in-tank pump or fuel filter. I know the previous owner of the car does not know when he last changed fuel filters.

Thanks for the help.

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rspi
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Year and Model: 850 T-5R Wagon
Location: Cincinnati OH
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Post by rspi »

What kind of car do you have?
'95 855 T-5R M, Panther - 22/28 mpg, 546,000 miles
'95 955 T-5R Yellow Wagon, Lemonade, 180,000 miles
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Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

blynx
Posts: 3
Joined: 27 November 2012
Year and Model: 740, 1991
Location: United States

Post by blynx »

This one is a 1991 740T

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