couple of rev related issues | FerrariChat
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couple of rev related issues

Discussion in '348/355' started by thibaut, Sep 4, 2015.

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  1. thibaut

    thibaut Formula Junior

    Feb 28, 2004
    530
    London, UK
    Full Name:
    Thibaut A.
    #1 thibaut, Sep 4, 2015
    Took my 355 challenge out a few days ago. unfortunately not on track but to do some shopping. I was not able to push it, rather I was limited by traffic.
    The car was just out of its cambelt service.

    two things happened:
    1) on a few occasions the idle revs were around 1300 rpm. on some other around 800 rpm which I consider normal. After a bit of a more spirited few kms seems seemed to return to normal.
    2) more worryingly, at one point engine seemed to refuse to rev above 5500 rpm. As if I was hitting rev limiter. Again it somewhat cleared itself up and then no problem to explore full range.

    Could it be the sparkplugs fouling a bit ? I had to drive slowly at some points at low revs. With the specific ecu of the challenge car could it be the cause ?
    I am also thinking dodgy electrics ? I have noted in the past random abs lights going on and off but no CEL though. Or a fuel pump issue ? I understand the rubber goes all goey and clogs the pump.
    expert views appreciated.

    best
    thibaut
     
  2. redwedge

    redwedge Formula Junior

    Sep 30, 2012
    468
    London
    Full Name:
    Steve C
    #2 redwedge, Sep 4, 2015
    I suspect that the mechanic did not follow the ECU relearning procedure properly after isolating the battery while servicing your car.
     
  3. thibaut

    thibaut Formula Junior

    Feb 28, 2004
    530
    London, UK
    Full Name:
    Thibaut A.
    #3 thibaut, Sep 4, 2015
    will do a search on this topic.
    but my experience with other ferraris of same vintage suggests it can't have such an impact.
     
  4. SoCal1

    SoCal1 F1 Veteran
    Owner Silver Subscribed

    Jun 14, 2011
    8,633
    SoCal LA/OC/New Mexico
    Full Name:
    Tim Dee
    #4 SoCal1, Sep 4, 2015
    Hi Thibaut

    Yes could be plugs but more likely sounds like a bad connection, maybe from plugging unplugging the wire looms.

    Try resetting the ECU by disconnect battery 15 min

    Connect battery start car let it idle for 10 minutes then go for a little ride

    Good Luck :)
     
  5. johnk...

    johnk... F1 World Champ
    Owner

    Jun 11, 2004
    11,267
    CT
    Full Name:
    John Kreskovsky
    #5 johnk..., Sep 4, 2015
    ...and remember when you start the car DO NOT depress the accelerator pedal.
     
  6. thibaut

    thibaut Formula Junior

    Feb 28, 2004
    530
    London, UK
    Full Name:
    Thibaut A.
    #6 thibaut, Sep 4, 2015
    ok will try that next time the car is out of hibernation.
     

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