P0301 code after sitting in rain all weekend

[uniberp]

This is the second time it's  happened. 

 

Bucking, backfiring, eventually going smooth as it gets warm. Code P0301. Some thread mentioned something about O2 sensor.

 

It's quite humid here, lots of wild temp swings with rain off and on. Parked outside.

 

2008 Forester auto 99k miles.

 

 

[1 Lucky Texan]

this can be spark plug wires.

 

try using a plant mister at night - spray the wires and look for arcing.

 

anyway - 17 year old plug wires if original, get a set of OEM or NGK (?) wires - most generic wires don't seem to work on soobs.

[dada0312]

It is unfortunate, I am a novice！

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RS Gold|RS 07 Gold

[mikaleda]

I have had good luck with Napa's lifetime wires.

 

If its acting up in really wet weather I would check your plug wires first. Misting water over them will make them arc if they are bad. Like 1luckyTexan said a plant mister or spray bottle with a mist option should work.

[unibrook]

Mist the coil and wires at night with the engine running.

[somick]

On my 2010 Forester manual recommends changing spark plugs every 30,000 miles.  With your 99000 when was the last time the plugs were changed?

 

Sam

[uniberp]

On my 2010 Forester manual recommends changing spark plugs every 30,000 miles.  With your 99000 when was the last time the plugs were changed?

 

Sam

 

"Oops" should about cover it. 

 

 

My 97 S10 4.3 was my first new car, and the spec on plugs for that Chevy was 90k miles.

I guess I thought that changing plugs was as old-timey as zurks.

I've replaced more engines than plugs on subarus, none, thankfully, due to old plugs.

So this is what original plugs look like at 100k. #1 is on the left. Idk what the others are.

And the new driveshaft for the S10 has zurks.

Oh well, we'll all have self-driving cars soon.

Edited April 13, 2016 by uniberp