tj21 Posted August 18, 2011 Share Posted August 18, 2011 My understanding is that all timing advance is done by the ECU on my 2.5L, referring to this thread: viewtopic.php?f=2&t=24018&view=next What mechanical part is advancing? It appears to me the entire distributor shaft from where it's splines meet the camshaft up to where the rotor sits is one fixed piece with no rotating parts (relative to each other... it all spins together). What am I missing? Quote Link to comment Share on other sites More sharing options...
Geonovast Posted August 18, 2011 Share Posted August 18, 2011 There's no mechanical advance. It's all electronic. Quote Link to comment Share on other sites More sharing options...
tj21 Posted August 18, 2011 Author Share Posted August 18, 2011 There's no mechanical advance. It's all electronic. But what advances? Just the timing of the spark? Or does the rotor spin at a different rate than the splines at the camshaft? Quote Link to comment Share on other sites More sharing options...
Geonovast Posted August 18, 2011 Share Posted August 18, 2011 Just the spark. It would be impossible for the motor to run if the distributor spun at a different speed than the cam. Quote Link to comment Share on other sites More sharing options...
tj21 Posted August 18, 2011 Author Share Posted August 18, 2011 Thanks Geonovast, that will help me figure out my problem. My searches on here and google didn't give me a clear answer to how electronic timing worked. Quote Link to comment Share on other sites More sharing options...
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