Menu toggle

Hot!981 2.7 hesitation @ 2000rpm

Author
Tom__P
PCGB Member
  • Total Posts : 12
  • Joined: 2018/12/05 09:14:15
  • Status: offline
Tom__P PCGB Member
2019/11/06 12:36:52 (permalink)

981 2.7 hesitation @ 2000rpm

Hi guys and gals,
I'm looking for some reassurance from the 981 owners please.
I've had my 981 for around 18 months now and love it, but notice its always had a hesitation under light acceleration at 2000 rpm. Is this simple a valve/gearing shift?
Has anyone else noticed it?
Thanks,
Tom 

11 Replies Related Threads

    Si1968
    Guest of the Club
    • Total Posts : 54
    • Joined: 2015/12/18 22:05:16
    • Status: offline
    Si1968 Guest of the Club
    Re: 981 2.7 hesitation @ 2000rpm 2019/11/29 11:00:47 (permalink)
    manual or PDK?
    Motorhead
    PCGB Member
    • Total Posts : 4194
    • Joined: 2011/04/20 12:13:14
    • Status: offline
    Motorhead PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/11/29 12:05:35 (permalink)
    Tom,

    Modern engines and auto transmissions are set up to minimise emissions and maximise fuel economy, which can introduce engine flat-spots, so it's possible that your engine is falling foul of this.
     
    Porsche's DME controlled Variocam Plus variable valve timing and lift system operates over a wide engine speed range, so it's possible that the hesitation you're experiencing could be due to Variocam Plus operation. I think the only way to ensure that it's functioning correctly is to get a comprehensive diagnostic check using a PIWIS tester or a similar Porsche-compatible system.
     
    Jeff 

    987.2 Cayman S
    North Beds (R10 & R24)
    Tom__P
    PCGB Member
    • Total Posts : 12
    • Joined: 2018/12/05 09:14:15
    • Status: offline
    Tom__P PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/11/29 12:15:17 (permalink)
    Hi Guys,
    Thanks for your feedback. I think it could be a case of me just being over sensitive but its definitely there.
    Its a Manual btw.
    Cheers,
    Tom 
    Motorhead
    PCGB Member
    • Total Posts : 4194
    • Joined: 2011/04/20 12:13:14
    • Status: offline
    Motorhead PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/11/29 12:39:57 (permalink)
    Tom,
     
    Just a thought but I think that your 981 has Sport button which changes the throttle to a more aggressive map when selected. If so, do you still get the 2,000 rpm hesitancy when in Sport mode?
     
    Jeff

    987.2 Cayman S
    North Beds (R10 & R24)
    CLIFFWILKINS
    PCGB Member
    • Total Posts : 1664
    • Joined: 2004/08/04 11:53:17
    • Status: online
    CLIFFWILKINS PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/11/29 12:52:32 (permalink)
    Geoff your correct a 981 2.7 does have a sport button 
    Take it your using the higher octane fuels does give a tad more response.
    Enjoy.

    Assistant Register Secretary
    Following: @BoxsterRegister
    Current cars
    Cayman R Peridot
    Boxster 981 GTS White
    Previous
    GT3 Mk 2
    GT3 Mk 1 S/Y Missed
    Cayman Sport Viper Green
    996 4S
    4 986 Boxsters
    987 Boxster
    3.2 Carrerra
    944 &924
    Tom__P
    PCGB Member
    • Total Posts : 12
    • Joined: 2018/12/05 09:14:15
    • Status: offline
    Tom__P PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/11/29 14:47:33 (permalink)
    Hi Jeff,
    I will have a play with the Sport button on the way home this eve and see if i still get the hesitation.....
    Cheers,

    Tom 
    MrDemon
    PCGB Member
    • Total Posts : 3108
    • Joined: 2005/02/01 16:22:51
    • Status: offline
    MrDemon PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/11/29 18:04:34 (permalink)
    Co2 tax dodge,
     
    any way don't ever let your car go to 2k !  it's a high reving flat 6 

    Radio ? NONE.
    Cup Holder? NONE
    Air Condidioning? DITTO
    A pure roadster. Reduced to the essentials
    Still the fastest...
    Tom__P
    PCGB Member
    • Total Posts : 12
    • Joined: 2018/12/05 09:14:15
    • Status: offline
    Tom__P PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/12/02 08:29:25 (permalink)
    Bloody hell its cold today!!!!!
    So, taking on your advice and suggestions, and having carried out a thorough scientific review, the likes of which a Bosch emissions engineer would be proud off, of my question regarding the hesitation on my 981 2.7 manual. Having put it into sport mode it goes away which leads me to think its nothing serious....
    I would be interested to know if anyone else with the same spec as mine has noticed anything similar though.
    Thank you for all of your feedback.
    Tom 
    Motorhead
    PCGB Member
    • Total Posts : 4194
    • Joined: 2011/04/20 12:13:14
    • Status: offline
    Motorhead PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/12/02 10:15:23 (permalink)
    It certainly is Tom. A bit slip-slidey out there, and not ideal weather for Porsches fitted with big, wide summer tyres.!
     
    From memory, I think that the more aggressive Sport throttle map gives roughly twice the throttle opening for a given throttle pedal movement, so you could try consciously giving it a bit more welly at low speed in standard mode to see if that makes any difference. Maybe it's a just a combination of low speed engine/throttle mapping and your driving style?
     
    Incidentally, my 987.2 CS has the Sport Chrono option which includes the throttle mapping and also a more aggressive engine map, but I don't know if the latter is included in the standard Sport option on your 981. If it does then the combination of the two could also account for the removal of the 2,000 rpm flat-spot when you select Sport mode. Personally, I prefer the more relaxed standard throttle mapping for general driving and only use Sport mode for track driving and the occasional traffic-free back-road blast.
     
    Jeff 

    987.2 Cayman S
    North Beds (R10 & R24)
    Peter_Bull
    PCGB Honorary Member
    • Total Posts : 3163
    • Joined: 2002/12/22 15:23:15
    • Status: offline
    Peter_Bull PCGB Honorary Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/12/02 11:48:41 (permalink)
    Hi Tom
     
    I have had my 2.7 since new and have never experienced the flat spot you describe. 
    I would get a PWIS check done that should identify the problem you have. 
    Hopefully it will be something simple and inexpensive.  Fingers crossed.


    Forum Administrator
    2014 Cayman 2.7 PDK Racing Yellow
    2019 BMW 4Series Convertible M Sport Plus, Black metallic with black leather
    Located in Lancashire
    MrDemon
    PCGB Member
    • Total Posts : 3108
    • Joined: 2005/02/01 16:22:51
    • Status: offline
    MrDemon PCGB Member
    Re: 981 2.7 hesitation @ 2000rpm 2019/12/03 10:54:41 (permalink)
    It's a VW/Porsche CO2 hack 
     
    that's all and you should not see it in real life as you should not be at 2k !!!
     
    Cayman R does it also, a few people moan, but again don't lug the engine !!

    Radio ? NONE.
    Cup Holder? NONE
    Air Condidioning? DITTO
    A pure roadster. Reduced to the essentials
    Still the fastest...
    Jump to:

    Posts made and opinions expressed are those of the individual forum members

    Use of the Forum is subject to the Terms and Conditions

    Disclaimer

    The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

    Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

    When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

    Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

    Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

    © 2019 APG vNext Commercial Version 4.6