The idle problem may be a result of a dirty or faulty idle air control valve. Other possible causes of a high idle include vacuum leaks, EGR system malfunctions, malfunctioning oxygen sensors, dirty fuel injectors, fuel pump malfunction, faulty spark plugs, a faulty mass airflow sensor, a malfunctioning throttle and, rarely, a PCM/ECM malfunction. and why would you say that? my idle is 760 with everything off. Is 900 RPM idle good?Ĩ00-900rpm is normal for a 1.8t-it will shake a little…it is a 4 cylinder remember. High idle means the highest engine speed obtainable when the engine is disengaged from the transmission and is free-wheeling. If your car’s RPM is above 900 with a warm engine while idling, it is likely using too much fuel.
For most 2 liter and below sized engines the vehicles, the standard idle speed should be around 750 RPM (when the engine is warm). High RPM – Idle speed is measured in revolutions per minute (RPM).
The RPMs will jump up and down, for example, or they’ll fall below 600 RPM (or whatever is typical for your vehicle). If your car is idling rough, though, it won’t feel smooth. In most of today’s cars, an idle speed of 600 to 1000 RPMs is average. And a bad alternator can also cause fast idling in your engine.The idle speed should feel consistent without skipping or slipping. An overheating engine will often idle higher than normal, so be sure to check your engine temperature gauge. The leak could be sourced at the seal, or more often, in one of the attached hoses. If the IAC motor’s vacuum port is leaking, this can be another cause of high engine idling. Other times it can be a problem with a cracked intake tube. Often this is a result of dirt buildup in the air intake. When your car’s throttle is malfunctioning, this can cause your car to stall or idle high. If your powertrain control computer is misreading idle speeds, this can cause a high idling malfunction. If all of your vehicle’s fuses are still good, the computer associated with any of these electronic elements could be at fault. Next, your high idling could be caused by a computer malfunction. This can be impacted by bad fuses in many different electronic systems in your car. In modern vehicles, engine idle speed is most often controlled by the idle air control (IAC) motor. The most common problem is a faulty fuse.
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