moner Posted April 16, 2011 Report Share Posted April 16, 2011 the RPM of my car goes up n down when the engine is on but car is not moving any reasons for this to happen??? Link to comment Share on other sites More sharing options...
rohitkr Posted April 17, 2011 Report Share Posted April 17, 2011 Check the alternator supply as it has voltage meter which produces current as per requirement, if its freaky can cause such weirdo behaviour. If you mean rpm actually goes up and down not just needle, then you need good engine tune having OBD II tool to set the idle at factory setting. Link to comment Share on other sites More sharing options...
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