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> Intermittent Stalling
post Oct 4 2019, 08:20 AM
Post #1


Group: Members
Posts: 3
Joined: 20-August 15
Member No.: 156,753
Status: Offline
Location: USA
Drives: 2006 V70

My 2006 has been stalling intermittently for 6 mos or so. At first, it was accompanied by erratic idling at a light. So first things first, I replaced the plugs with OEM Volvo plugs, as it'd been two years since the last plug change. The choppy idle totally went away, the stalling did not. It happens maybe once a week or two. Or this week, it happened once a day for three days straight. It almost always happened within the first 10 mins of having left the house. I almost was able to say that it always happened with the A/C on, but this week it happened with the A/C off.

It's my wife's car so I don't drive it much. These past 6 mos have been fairly hot here in Atlanta, but I'm not sure that has anything to do with it. About 3 mos ago, after it stalled, it threw a CEL, and the code was a P303, indicating a misfire in cylinder 3. Aha!, I thought, must be a bad coil. I swapped the #3 and #4 coils, hoping it'd then throw a P304 code. It didn't.

I replaced the coils anyway, given the car has 175k miles. I also cleaned the MAF and intake. The air filter is relatively new.

Googling and researching, it looks like these areas are potential things to look into and consider, more or less in order of ease/cost, from easiest/cheapest to hardest/expensive:
1. Camshaft position sensor
2. Crankshaft position sensor
3. Fuel pump relay
4. Fuel filter
5. Fuel pump

I've looked for the relay but can't seem to find it. Also, I looked for the fuel filter under the passenger side and it's not there, so I must have a model that has it in the tank.

Any thoughts/recommendations most appreciated. Also, I have the 5 old ignition coils that I'm happy to give to whoever wants them. I know for a fact four are good, and I suspect that the #3 coil is still good too. I'd just ask that you pay for shipping.

Many thanks in advance.
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post May 29 2021, 08:07 AM
Post #2


Group: Members
Posts: 1
Joined: 29-May 21
Member No.: 253,071
Status: Offline
Location: Canada
Drives: Volvo 245

Try replacing your MAF sensor- the elecrical soket on mine was loose and correded - solved the problem. Using 91 Octane and Castrol Edge Synthetic
2002 V70-T5
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