Rick's Free Auto Repair Advice

Posts Tagged: Altima

High idle, rough idle

What causes a high idle, rough idle Diagnose and fix high idle or rough idle Any time you see a high idle, rough idle high, or hunting idle, it’s time to suspect a vacuum leak. Extra air leans out the exhaust mixture, which is detected by the oxygen sensor and reported to the powertrain control module (PCM). To correct the lean condition, the PCM adds fuel. The extra fuel and extra air are the equivalent of pushing down on the accelerator. As the engine speeds up, the PCM notices that … Read More


Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN