BigGuy

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About BigGuy

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  • Car
    1990-GLX-1.8(GD)-manual
  1. Increasing (idle) RPM

    Hello all. I have a 626 with 1.8 engine (GD) from 1990. It's still a bit below 100k km. For most of the last decade it is occasionally driven with intervals of up to months. The last few times the engine's RPM when the pedal is released tends to increase compared to the idle RPM it should have. During the drive the RPM seems to gradually increase. This is awkward at traffic lights and when driving slowly, rounding corners etc. I'm not sure why the RPM doesn't return to the normal level when the pedal is released. Friction between the inner and outer cable doesn't seem likely. I can't influence it by letting the pedal 'snap' up from the depressed position. When the engine is started it runs normally with the automatic choke causing a slightly increased RPM but instead of the RPM decreasing when the engine warms up it starts to increase and gets gradually higher during the drive which suggests being related to the engine warming up. Anyone recognising this? Can it be the carburettor? I've had some problems before with the choke valve getting stuck which resulted in the engine revving down and shutting down shortly after driving away. Could this be a milder manifestation? The choke valve not opening up all the way again as the engine heats up? If so what maintenance should I perform to get it to work properly again? Or could it be something else? Thanks for your help.