Wierd engine behaviour 1999 306 XSI 16v 1998cc.......

Discussion in 'Peugeot 306' started by Androo, Jul 18, 2005.

  1. Androo

    Androo Guest

    Expert opinions urgently required.....

    My 1999 (T-reg) 1998cc 16v Peugeot 306 XSI has a wierd engine
    characteristic that I’m a bit baffled by. It only seems to happen
    when the car has been running for half an hour or longer, and seems to
    come and go a lot. I suspect it’s to do with the fuelling. When it’s
    misbehaving, the engine is very hesitant, it takes a few seconds to
    respond to the throttle, even when out of gear, and the engine seems
    to have difficulty in responding to changes in engine speed, e.g. when
    changing down to a lower gear and pressing the accelerator I get a
    hesitation that can last a couple of seconds before the engine pulls
    forward in a rather lumpy manner. This never happens within the first
    20 minutes of any journey, and the car might behave normally if it
    gets to remain at the same engine speed e.g. when cruising along the
    motorway for an hour. On Tuesday it was fine on a long motorway
    journey until I hit stop-start traffic and it started misbehaving, it
    got got so bad that the engine started stalling when left to idle.
    Whenever I started the engine following a stall it would start on the
    button and behave normally for a few seconds (presumably until the
    automatic choke turned itself off) and then would go back to
    misbehaving. Then on one particular occasion when the engine cut out
    when I was changing between gears at about 25mph I just dropped the
    clutch into 2nd gear and bump started the engine, it spluttered and
    lurched into life and the problem instantly disappeared for the rest
    of the journey (but this problem still occurs at the moment just as it
    did before).

    Any ideas what this could be? I’m baffled because it only seems to
    happen when the engine is hot, and i’m confused at how bump-starting
    the engine temporarily cleared it on Tuesday - I’ve thought it could
    be a clogged/collapsed cat, or a ropey lambda sensor - Any other ideas
    what it might be? The car has done 100k miles by the way, it makes a
    bit of a tappy/ticky noise at 2k+ RPM but i’m told this is common on
    306s and is probably just noisy fuel injectors........
    Androo, Jul 18, 2005
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  2. Androo

    Androo Guest

    Androo, Jul 19, 2005
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  3. Androo

    noall Guest

    i no this sounds simple but have you checked the spark plugs as ive had one
    with the same kind od fault and it had ngk single electrode plugs in it
    instead of multi point replaced them and it cured the fault got to be
    worth a try
    noall, Jul 19, 2005
  4. Androo

    Nom Guest

    Check *ALL* the pipes in the engine bay for leaks. My 2.0 8v 405 had a split
    vacuum pipe from Manifold to MAP Sensor, and it had very similar symptoms.
    Nom, Jul 20, 2005
  5. Androo

    Androo Guest

    The pipes all look okay, not corroded or anything. I’m going to have
    a bash at changing the lambda this weekend if the weather’s good.
    Does anyone know where to find the MAP sensor in a ’99 306 xsi? Are
    they easy to change?
    Androo, Jul 22, 2005
  6. Androo

    Vanja Guest

    There is a ton of people with the same problem on 1.8 and 2.0 16V motors on
    different cars (306,406..) Far as I know (and I am following all the forums
    because I am pissed of with this situatuion) nowbody knows what is the
    reason. There are different theories (stepper moror, ignition coil, low
    voltage, Sagem or Bosch ECU...) but some of the people with this problem
    already changed all this parts (!!) and they are still strugling with the
    same problem. I am planning to write a letter to the Peugeot headquarters
    with enclosed all the mails from formums and discuusion pages. If you are
    willing to write one (I am from Croatia and my English is not perfect) i
    will supply you with the copies of most of the topics about this theme.
    Vanja, Jul 25, 2005
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