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whistling noise at cold start

Discussion in 'Engine Compartment' started by bhai, Jun 17, 2012.

  1. bhai

    bhai Esperto

    Messages:
    1,184
    Ahmednagar
    Grande Punto 1.3 90 HP
    I am facing strange problem.

    At cold start if I rev engine upto 2000 to 2500 RPM,I am getting whistling noise & too much poor throttle response.

    I know that FIAT has suggested not to expect good throttle response but I am getting too much poor throttle response & whistle at cold start.

    But noise disappears after keeping engine idle for 2-3 min.

    First I thought whistling noise is due to leaky turbo. But whistle is disappearing after warm-up of engine.

    What may be the reason.
  2. sungoa2010

    sungoa2010

    Messages:
    2,878
    Goa
    Does the noise is present if you press the pedal while in neutral ?
  3. bhai

    bhai Esperto

    Messages:
    1,184
    Ahmednagar
    Grande Punto 1.3 90 HP
    Yes. Noise comes in neutral gear. But disappears after slight engine warm.
  4. sungoa2010

    sungoa2010

    Messages:
    2,878
    Goa
  5. bhai

    bhai Esperto

    Messages:
    1,184
    Ahmednagar
    Grande Punto 1.3 90 HP
    @ Sungoa

    Thanx for response. But link you have provided contains the reasons because of mechanicle fault e.g. Vaccum leak,leaky turbo or intercooler & pipe etc.

    In my case noise is disappearing after engine warm up. If I have leaky turbo/intercooler/hose noise should come even at engine hot.

    But whistling is only at cold engine. I forget to mention one thing.

    After warm up whistle noise converts into whinning noise & many time brakes are fading.
    In case of emergency braking I have to press brake paddle hardly & I am in need of pumping the brake paddle while in need of urgent braking.

    In addition to that I am listening air leak noise near front right tyre at engine idle.
    So is this vaccume leak ?
  6. vIjAy_kHaSa

    vIjAy_kHaSa Esperto

    Messages:
    1,353
    Panchkula
    After shutting down your car check after 2 hours if there is any assistance in brake pedal if not your booster has a leak.

    I would suspect the belts though for whistling noise
    Last edited: Jun 18, 2012
  7. Hi Bhai,
    I noticed a similar sound today for the first time in my Punto 1.3 MJD. It was a cold morning. The noise disappeared after 5 mins of drive. Is this something to be worried or it is common in all Punto's. Have you got this checked? please throw some light.
    Anyone on forum who have come across such noise... Please advise...

    Regards,
    Prashanth

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