Question about 1998 Subaru Legacy

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Miss fire in cylinder #1, 1998 subaru legacy outback

Have DTC Code PO101, a miss fire in cylinder #1. I have inspected the spark plugs but all are in good condition. A tune up was done approx. 30k miles ago. The fuel filter was slightly restricted but just barely. The wires ohmed out within spec's. Originally, had a PO103 code along with a PO325 knock sensor code. Resistance was out out range and replaced the sensor. The resistance on the coil reads good but I haven't seen it on the scope. I don't have a scope to see and read the ignition patterns. The resistance at the injector is good, 11.5 ohms.
problems occurs after the car warms up and intermittently. what am I missing?

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  • mimissa Dec 20, 2008

    Hi, I have the exact same problem. The exact same codes comes on, we changed the spark plugs it stopped for a month and it started to do it again. Have you found the problem yet?

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Fuel injectors getting ground from pcm?

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2006 subaru outback, missfire code - cylinders 1 and 3. Could it be coil or plugs and wires I'm told at service shop. Anybody come across this?


had miss fires with my 92 legacy gt.typical suby fault coil packs always go out in saying that check that you dont just have a foul or failed spark plug. easy fix if it is the coil i replaced mine with 2nd hand ones from the same model usualy find them at most subaru specialists wreckers etc depending on model.

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its faulty coil.

Get the compression test done on each coil.these will let you know if its faulty coil or not.

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It can be issue with spark plugs or faulty spark plugs. Also get the compression test done for cylinders. If any of cylinder shows low compression then required, then that particular cylinder will cause misfire.

Also get obd codes scanned, the error code will let you know which cylinder is misfiring or all cylinders are misfiring.

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For your trouble shooting I suggest you to refer the help oinks below. It has step by step details for many engine misfire issues.

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This will help.

Thanks.

Nov 28, 2012 | Cars & Trucks

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I have a 99 Subaru Legacy (Outback, 2.5L). The check engine light has come on and the codes indicate Cylinder 3 and Cylinder 4 misfires. The light came on about two weeks ago, and occasionally disapears...


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The #1 cylinder is located at the front spark plug on the right or passenger side of the engine, and here is a firing order diagram to help assist you.


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99 subaru legacy outback w/2.5 L boxer engine. Have PO 0440 obd II code. 98K miles Car misses at low RPM. Has a hessitation went you accellerate. Runs smooth at highway speeds. Replaced plugs, plug wires,...


This code is associated with the EVAP system which includes, but not limited to gas cap, fuel lines, carbon canister, purge valves. The EVAP system is supposed to prevent fuel vapors from escaping the fuel system

If you have this code, one of the following may have happened:
Gas cap not installed properly or faulty gas cap
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This code can be tricky to resolve, but try some of these:
Remove and reinstall the gas cap and or replace the gas cap and clear the code and see if it comes back
Inspect the the hoses, and tubes for any sign of a hole or cut
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2 Answers

I have a 1997 Subaru Legacy Outback AWD. The


when you replaced the plugs , was one of them (cylinder 1 ) dirty and fouled ?
I'm thinking that bad rings in cylinder would give you low compression , and eventualy cause the missfire by fouling up the plug.
There is an inexpensive product that will help with the compression by filling up scratches in the cylinder walls. It is called Restore , and it is one of the only products of its type that I have used , and feel actually works.
Unfortunately , if your rings are broken , or badly worn , nothing in a bottle will fix them.

If your car had a distributor cap and rotor , I would change them too.

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