sirtokesalot Posted March 24, 2022 Share Posted March 24, 2022 my friend has a 2005 forester ive been working on. every 30 to 45 seconds when its warmed up theres what seems like single missfire then it goes back to normal idle. it only does it at idle and is not throwing a cel for it. what could be causing it? it may not be a missfire but thats what it sounds like. idle idle hickup/missfire sounding thing idle idle Quote Link to comment Share on other sites More sharing options...
1 Lucky Texan Posted March 24, 2022 Share Posted March 24, 2022 2005 is old enough to have 3-4 things that might cause this. old plug, old plug wires, leaky VC gaskets, knock sensor,.....etc. live data from the ecu might be a good place to start. Quote Link to comment Share on other sites More sharing options...
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