anti-stall, fast idle speed etc on 306xtdt

Discussion in 'Peugeot 306' started by Richard, Sep 30, 2003.

  1. Richard

    Richard Guest


    I have had my peugeot 306 xtdt for about 4 months and was just intrigued to
    learn more about diesels etc.

    Can anyone tell me exactly what the purpose of the anti-stall and fast idle
    speeds are?

    I haven't got any probs with the car and believe the speeds are correct, I
    just want to learn more about the dang thing cause it's great!

    Richard, Sep 30, 2003
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  2. Richard

    yeha Guest

    You should buy the Bosch Technical Manual. It's Bosch no. is 1 987 722
    164 and it's ISBN is 3-934584-38-1.
    It's about £15.

    The fast idle ups the tickover by 100revs for cold starting. It's done
    on the early engines by a cable from a block in the side of the
    thermostat housing. The effect of the cable is to advance the
    injection point. I can't find a reason for the anti-stall because
    Bosch don't use that term in the book.
    yeha, Oct 1, 2003
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  3. Richard

    G.T Guest

    I don't really agree with Yeha's answer, the fast idle plays on throttle to
    speed up engine (about 100RPM, I agree) for cold start. It's now fully
    automatic with a cable (manual command on older Diesels), or by ECU (on HDis
    for example).

    What you call "anti stall" is known here as "Torque regulator" ("régulateur
    de couple") and is intended to maximize low revs use in drive. With that,
    you can start just with clutch and no throttle, run at idle speed on 1st &
    2nd gears.
    That's the reason why people often say "you can't stall with a Diesel".
    G.T, Oct 3, 2003
  4. Richard

    Mike Buckley Guest

    Hmm on this topic I think I may have a minor developing problem on my
    My normal commute is around 50 miles each way - most of which is quick
    motorway (M62, Leeds<->Hull). If I leave the car around 30 minutes
    before going to restart it always start first time but very occasionally
    it will struggle to get to normal tickover, normally varying between
    500rpm and 1200rpm approx. This lasts only 3-4 seconds before it will
    either stall or tickover will level off as normal. Pumping the pedal
    makes no difference whatsoever, and if it stalls it always starts first
    time next time and ticks over normally.

    Anybody got any clues? It happens so rarely that I'm not going to
    rummage around myself, but it could be something for me to ask my local
    mechanic to check out at the next oil/filter change.

    Mike Buckley, Oct 3, 2003
  5. Richard

    Andrew Kirby Guest

    If I leave the car around 30 minutes
    I can't offer an explanantion, but I am interested - once, when I stopped
    at a junction, the idle speed of my 205 TD oscillated up and down for
    several seconds. It has never done it since, so I haven't had the
    opportunity to try to diagnose what might have caused it. I'd be
    interested to hear if anyone figures it out.

    Andrew Kirby, Oct 3, 2003
  6. Richard

    Ollie Walsh Guest

    Air bubbles in the fuel line caused my 205 1.7d to have an erratic
    tickover sometimes, could it be that?

    Ollie Walsh, Oct 3, 2003
  7. Richard

    G.T Guest

    Hello Ollie,
    I was going to tell the same. It happened twice to my brother ('91 205
    DTurbo), due to cracked fuel pipes (once the pipe that runs under the
    bonnet, once the one which is under the car, between tank & the steel pipe).
    G.T, Oct 3, 2003
  8. Richard

    Richard Guest

    so basically - even on a really steep hill i still won't need any throttle?
    Richard, Oct 3, 2003
  9. Richard

    Andrew Kirby Guest

    Hello Ollie,
    I'd agree except that it only did it once and hasn't done it once in the 6
    months and 10000 miles since (self healing fuel pipes? :)
    I did have a split fuel pipe a year or so ago - the rubber pipe which feeds
    the fuel filter was split where it joins the metal fuel pipe from the tank,
    but that just caused poor starting and hesitation, not a regular

    all the best,
    Andrew Kirby, Oct 6, 2003
  10. Richard

    G.T Guest

    Don't know...
    .... but it randomly happened to my brother, causing poor start, and / or
    oscillating idle, or slightly too high idle (if a 1000RPM is too high,
    anyway it isn't far too high. Really a pain when it's at 2kRPM and you're
    coming back to home at 3:00 AM).
    He replaced cracked fuel pipes, no problem ever. So it could well be a way
    to go. Not that a painful job, just count 1 or 2 meter of fuel hose.

    Interesting point I guess, my '93 205 still hasn't this problem, although it
    becomes a bit old - I mean, 10 years isn't that bad for a std quality
    plastic part.
    G.T, Oct 7, 2003
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