1-3-2-4 Posted March 30, 2009 Share Posted March 30, 2009 (edited) This issue has been so hard to pinpoint... I thought maybe it was the drivers side valve breather hose was not connected to the intake.. then i went to change the PCV valve which did nothing ( needed to be replaced) I'm still baffled.. it only happens when the car is cold and has been sitting 3+ hours.. you start up the car and give the car a little throttle and it seems like it's got a misfire. No CEL is on.. I have not did a seafoam yet because I just changed the oil, the plugs and wires are said to be new but not sure what plugs are in the car so I will have to check on that but I do have a sound file. I was told could be the IAC needs to be cleaned but what part of the IAC do I clean with the cleaner? Edited March 30, 2009 by 1-3-2-4 Quote Link to comment Share on other sites More sharing options...
MtTech Posted March 30, 2009 Share Posted March 30, 2009 Year? Model? 1.8, 2.2, ... ? 4EAT? 5MT? Mileage? Quote Link to comment Share on other sites More sharing options...
1-3-2-4 Posted March 30, 2009 Author Share Posted March 30, 2009 1995 Legacy 2.2L 5MT 198,685 Quote Link to comment Share on other sites More sharing options...
MtTech Posted March 31, 2009 Share Posted March 31, 2009 Misfire not a product of a dirty IAC. Inconsistent idle speed more common failure. PCV flow not likely either... I would remove and check the spark plugs, verify the wires are the correct fit to the plug, no carbon tracking on the plugs through the wire. Proper gap on the plug. (I would not recommend platinum, Iridium, or split-fire type plugs. Champion, Autolite are brands I would steer clear from as well) USE NGK BKR6E-11 stock #2756 spark plug (any parts house that carries them, or Subaru dealer). Subaru wires are the best (fit, performance, longevity) SOA430Q115 (dealer) I would suspect a fuel injector next, perhaps an O2 sensor. Some folks use the NGK copper plug in your application, they just require more frequent changes... Quote Link to comment Share on other sites More sharing options...
1-3-2-4 Posted March 31, 2009 Author Share Posted March 31, 2009 I will check on it Quote Link to comment Share on other sites More sharing options...
kudd Posted April 2, 2009 Share Posted April 2, 2009 My '90 w/214k 2.2 5MT misfires when wet until warmed up. Has me thinking coil pack maybe as I recently did plugs and wires (tho not subie wires....) Quote Link to comment Share on other sites More sharing options...
MtTech Posted April 2, 2009 Share Posted April 2, 2009 I would check to make sure there is no water in the spark plug holes. If there is, get the engine up to running temp, remove the wires and blow out the holes and wire ends with compressed air, let stand for a few minutes for the remaining to evaporate, re-assemble. If you can run the car in a dark environment, it is very easy to check for fouled wires and or coil by seeing the spark escape... Quote Link to comment Share on other sites More sharing options...
kudd Posted April 3, 2009 Share Posted April 3, 2009 Good idea. Thanks! Quote Link to comment Share on other sites More sharing options...
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