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Author Topic: Loss of boost  (Read 3405 times)

Offline Lethal

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Loss of boost
« on: January 18, 2016, 07:27:45 pm »
The Punto is 3 years old in February and I have noticed a power loss at full throttle. At first I thought it was a misfire but there are no warning lights. When I hold it steady on the motorway I can get it to boost to full on the gauge and then it drops to 3/4 boost and back to full repeatedly. It needed a service so I put it in the dealer and they couldn't nail it hard enough to see the fault and also they can't start a warranty without a fault code. I suspect it is the boost control solenoid but I don't know where to get one from.

AbarthForum.co.uk

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    Offline shadyracer

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    Re: Loss of boost
    « Reply #1 on: January 18, 2016, 09:17:50 pm »
    Can you read any part numbers from suspect part? I may be able to identify and source a little easier that way.
    So far ive found part numbers for Pierburg charger diverter valve / solenoid, 7.02909.07.0    , Bosch boost pressure sensor 0281 002 996, which looks very much like a Map sensor..the terminology for naming parts varies so much, so i hope these numbers give you an idea what to look for. :thumb:

    Offline Lethal

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    Re: Loss of boost
    « Reply #2 on: January 18, 2016, 09:34:55 pm »
    Thanks fo that, I haven't had chance to have a look at the valve yet in the daylight. I will remove it tomorrow and see if there is anything printed on it. Do these fail often?

    Offline shadyracer

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    Re: Loss of boost
    « Reply #3 on: January 18, 2016, 10:12:09 pm »
    You might see label without removing part. its not something  i get asked often for, a screenwash pump more likely to pack up quicker..

    Offline Lethal

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    Re: Loss of boost
    « Reply #4 on: January 21, 2016, 09:38:02 pm »
    Fitted a new valve today and the problem is solved. Oil had gather in the silicone hoses and they had gone a bit fragile which may have been contributing to the problem.

    Offline shadyracer

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    Re: Loss of boost
    « Reply #5 on: January 21, 2016, 09:55:54 pm »
    Cool..For the benefit of other owners on forum can you post here the number of it and brand please?  :thumb:

    Offline Lethal

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    Re: Loss of boost
    « Reply #6 on: January 25, 2016, 06:47:18 pm »
    The Fiat part number is 50521319 and described as an Electrovalve. I enquiried with the Abarth dealers and it was £89 plus VAT but got exactly the same part through a friend who had a trade account for £39.95 plus VAT. I am seriously thinking twice about ever buying an Abarth again.

    Offline studoc72

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    Re: Loss of boost
    « Reply #7 on: February 02, 2016, 11:22:30 am »
    Any links as to where you can get these from?

    My boost varies between .8 and a bar and its annoying me tbh.

    Offline Lethal

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    Re: Loss of boost
    « Reply #8 on: February 02, 2016, 06:53:36 pm »
    Sorry a mate of mine got it trade for me from a fiat dealer. Speaking to people after the event the problem is often caused by small splits in the 3 small rubber pipes. 2 of the pipes come with the new solenoid but I would have a good look at he pipes where the join to the intake pipe, solenoid and actuator. I have 10mm 1 ear hose clips so it was easy to cut the hose back and rejoin them.