subarusubarusubaru Posted December 31, 2016 Share Posted December 31, 2016 hey folks. I replaced both my spark plugs and wire about 5 months ago. I just recently checked the gaps on them and reinstalled them. The spark plugs are tight along with the wires. however every so often, when I am in 5th gear and going up slight inclines, my check engine light will start flashing at me. When i get the code read it brings up a misfire in cylinder 3. It doesn't feel like its misfiring though. It only flashes in 5th gear when going up inclines. Is this a fuel injector issue? the CEL eventually goes away after a day or so. Has anyone else had this issue? Am I losing compression in that cylinder? Link to comment Share on other sites More sharing options...
golucky66 Posted December 31, 2016 Share Posted December 31, 2016 Imo, sounds similar to an ignition coil starting to go bad. Slight to bad misfire when under heavy load (going up a hill in OD) Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted January 1, 2017 Share Posted January 1, 2017 any oil on the plug wire boots? can you swap wires around to see if the problem folllows that wire? Link to comment Share on other sites More sharing options...
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