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Old 01-17-2013, 09:02 AM   #1 (permalink)
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Default two cylinders then stalls

1996 outback, when coming to a stop, engine starts to knock like it is unbalanced, presumably running on two cylinders, then stalls. It will start immediately and run fine but when I come to a stop again it starts all over. When this starts I can keep the car going if i increase RPM's. but when i go there is very little power, feels like it is running on one or two cylinders. I have replaced plugs and wires. Engine light says misfire in 1 and 3. Is this a coil or something else electrical?
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Old 01-17-2013, 10:16 AM   #2 (permalink)
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Start with the basics.
How old are your plugs, wires?
What brand wires?

O.
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Old 01-17-2013, 10:37 AM   #3 (permalink)
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Sounds like a coil issue.
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Old 01-17-2013, 11:19 AM   #4 (permalink)
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IACV? Throttlebody needs cleaning? Slipped TB?

CEL on? get the code read and post here is so.

many things could cause this problem.
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Old 01-17-2013, 11:30 AM   #5 (permalink)
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He said he is getting P0301 and P0303.
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Old 01-17-2013, 03:13 PM   #6 (permalink)
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coil or slipped TB could be 'side specific' right?
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Old 01-17-2013, 03:21 PM   #7 (permalink)
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I agree. Unfortunately pulling the timing cover for that side of the motor requires removing the accessory belts.

I would pull the #1 plug and run the motor with the spark plug wire attached and see what the spark looks like.
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Old 01-17-2013, 03:26 PM   #8 (permalink)
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Then I would check the timing.
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Old 01-17-2013, 05:14 PM   #9 (permalink)
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Coil assembly triggers cylinders 1 and 2, and cylinders 3 and 4. 1 and 3 would mean that both coils inside the coil assembly are faulty. But then one might expect misfires on 2 an 4 as well.

Plugs and wires were replaced, and if there wasn't any change with this I doubt it's the type of plug or wire. (Even if the cars are sensitive, I would think that changing faulty plugs or wires should lead to different symptoms.)

1 and 3 are on the right side, so anything that is common to both left and right sides is a less likely cause.

Misfire could also be a fuel issue -- something with the right side fuel rail.

Certainly need more information about the car and engine (could it be a 2.2?) and maintenance, including TB service.
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