504 Idle Speed
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Thread: 504 Idle Speed

  1. #1
    1000+ Posts Pug_405_Mi16's Avatar
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    Default 504 Idle Speed

    Hello All,

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    Have recently spent some time resetting the timing on my '73 504. I found that the previous person who had timed it was way off, easy fixed I advanced it on and the car has regained it's usual zippy feel.

    The issue is with the timing advanced it has lifted the idle speed, I have adjusted the throttle stop screw but even with that a long way out it still idles a bit too quickly.

    Haynes makes reference to a screw on the rear of the carbie, but I have been unable to locate it on either the carbie on the car or the spare I have (by the way it's an original Solex).

    Any advice?
    Ben
    1989 Peugeot 405 Mi16
    1990 Peugeot 505 GTD Turbo Wagon
    2000 Peugeot 306 XSI
    1973 Peugeot 504 GL





  2. #2
    1000+ Posts Wildebeest's Avatar
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    Ben,
    A little bit of slack in the throttle cable may help.
    Beano and Tom_95 like this.

  3. #3
    1000+ Posts Beano's Avatar
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    ^ That man knows 504s !

    Be careful you don't adjust the stop for the butterfly valve, which is at the back of the carby. It's sometimes mistaken for the throttle stop. Then again, someone may have done that previously, causing your problem

    Haven't got a tiny air leak somewhere have you ? That will increase idle.

    ( If the vacuum advance diaphragm is ruptured and it sucks air, will that do it ? Anyone know ??)
    Last edited by Beano; 28th May 2019 at 06:00 PM.

  4. #4
    1000+ Posts Pug_405_Mi16's Avatar
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    Thanks,

    Will slacken the cable a bit and see how that goes, other items all check out AOK.

    Cheers
    Ben
    1989 Peugeot 405 Mi16
    1990 Peugeot 505 GTD Turbo Wagon
    2000 Peugeot 306 XSI
    1973 Peugeot 504 GL





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