THP engine problems, lack of power 2000-3000rpm

Discussion in 'General Motoring' started by DaveP, Oct 21, 2007.

  1. DaveP

    DaveP Guest

    I've got a 207cc and have been pleased with it for a couple of months. The
    THP 150 engine was initially quite powerful given it's only a 1.6 and the
    boost threshold was about 1500rpm. From there on up the power was pretty
    much linear.

    Now though after a new months I've noticed a flat spot between 2000 and
    3000 rpm - this happens on occasions, usually when you've just pulled out
    onto a roundabout!

    I did a little googling and there are some mentions of this on both the 150
    and the 175 bhp THP engines, and also being experienced with the same
    engine in the BMW mini, so my problem isn't unique. There is some
    suggestion the engine mapping is storing invalid values and the problem
    goes away if the garage reset the stored values.

    One guy has had his car in 7 times with various bits changed with no
    change, I wondered if anyone here has any more info? I don't particularly
    want unecessary time spent in the garage randomly changing bits. The
    salesman knew nothing of these problems when I asked last week.

    DaveP, Oct 21, 2007
  2. DaveP

    Brian Guest

    Disconnecting the battery for a few minutes will often reset all the stored
    values in the ECU.
    However, be careful as on many later Peugeots you can muck up the
    immobiliser and other bits in the computery if you disconnect and reconnect.
    Firstly lower window, then remove key, and close door. LEAVE for 5 minutes.
    Then disconnect battery. Again leave for 5 minutes or more for valued to
    reset to standard.
    Reconnect battery and again leave for a couple of minutes, then lean through
    open window and turn on the lights. This is to wake up the computer.
    Then you should be able to start as normal.
    If you don't follow this you might not be able to start the engine again
    without a costly visit to a main dealer.
    Brian, Oct 26, 2007
  3. DaveP

    DaveP Guest

    Hi Brian,
    Thanks for your reply - the car is only 4 months old and I've now read
    further reports that a dealer download sorts the problem out. If it weren't
    for that I'd have a go at clearing out the ECU!,1084.0.html

    What was odd is yesterday it was absolutely fine, but the day before it was
    a terrible drive. Doesn't seem to be temperature (external or engine) or
    running time related.

    I wanted to see if there's any official word from Pug I can quote to the
    dealer to save them changing random bits till they find the cause :(

    DaveP, Oct 26, 2007
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