Hey guys - 95 Legacy L, EJ22, Auto, with 212K on the clock - Have had a misfire code set on 2 different occasions recently - both times a cyl 2 misfire - Both times under the following circumstances

 

cold engine start, after sitting for at least 30 hours

warm & humid weather conditions

 

scenario goes like this...a week ago - weather very damp and warm - go out and start car, normal start up. 1st time it began to miss almost as soon as I put it in gear, gave it a bit of gas to keep it running, and it cleared up and ran fine all the way to work, and home again. Checked & cleared the code with the scan tool when I got home (P0302), and it was fine the rest of the week with dryer weather conditions.

 

Yesterday, very similar weather conditions (& car sat most of the weekend), go out and start car, normal start up, normal idle, left the driveway and about a 1/2 mile down the road it starts to miss - again, gave it some gas, and it cleared up and ran fine all the way to work - popped the hood at work during a break and that is when I found the unplugged vacuum line. Car ran fine on the trip home. Again, got out the scan tool, checked code - P0302 again - cleared code.

 

could the unplugged vacuum line to the EGR valve have had anything to do with the misfire?

 

Today it is quite damp out - foggy even, but cooler - will have to see if the misfire comes back or not...

 

I bet if you pull the spark plug wire on number 2 there is moisture in the plug well. Had this happen several times on my car. Eventually I had to RTV around the top of the plug boots. I drive through lots of water though. If you find moisture blow the hole out with compressed air if you can. If not just wipe it off and let it air dry for a few hours. It help to let the engine run up to normal temperature before pulling the plug wire so the heat will help evaporate moisture away. Be sure to wipe the top lip of the boot with silicone grease to help keep water out.

Edited May 13, 201411 yr by Fairtax4me

Can do that easy enough.

 

Thanks Fairtax.