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Alfa engine

  • 04-06-2010 7:06am
    #1
    demon83
    Registered Users, Registered Users 2 Posts: 61 ✭✭


    I bought an Alfa GT 2 months ago and when checking the engine oil last week I noticed it was a bit low so I topped it up with the owners manual recommended 10w 40. However in he last few days I have noticed that the engine dosnt seem to be ticking over as smoothly. It normally revs just below 1000 rpm but every few seconds will jump to 1300 rpm.
    What could cause this? I used the recommended oil so it may be something else, what should I do?


Comments

  • #2
    samsemtex
    Closed Accounts Posts: 935 ✭✭✭samsemtex


    demon83 wrote: »
    I bought an Alfa GT 2 months ago and when checking the engine oil last week I noticed it was a bit low so I topped it up with the owners manual recommended 10w 40. However in he last few days I have noticed that the engine dosnt seem to be ticking over as smoothly. It normally revs just below 1000 rpm but every few seconds will jump to 1300 rpm.
    What could cause this? I used the recommended oil so it may be something else, what should I do?

    Does it stop when you turn the air conditioning off?


  • #3
    demon83
    Registered Users, Registered Users 2 Posts: 61 ✭✭demon83


    I have not tried turning the air con off. I will try this evening. The only difference was adding some engine oil.


  • #4
    king_of_inismac
    Registered Users, Registered Users 2 Posts: 1,368 ✭✭✭king_of_inismac


    not sure about the oil loss (my old 156 used to loose a bit every week!) but the changing revs could be due to a faulty maf?


  • #5
    samsemtex
    Closed Accounts Posts: 935 ✭✭✭samsemtex


    demon83 wrote: »
    I have not tried turning the air con off. I will try this evening. The only difference was adding some engine oil.

    I wouldnt say its anything to do with the oil. 10w40 is the correct oil for a twin spark and the brand doesnt really make a difference when you are only topping up the oil. It wouldnt cause that anyway. My 156 shudders a little when i have the air con on and i'm only idling. something similar used to happen with my Volvo s40.

    Get yourself a username and log into Alfa owner. This question will almost certainly have been asked by someone else before so have a search there.

    http://www.alfaowner.com/Forum/


  • #6
    Mr Benevolent
    Closed Accounts Posts: 12,456 ✭✭✭✭Mr Benevolent


    Did you put the oil filler cap back on properly?


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  • #7
    the merchant
    Registered Users, Registered Users 2 Posts: 547 ✭✭✭the merchant


    Sounds like the throttle body - all the ts's suffer from it. A good clean with carb cleaner could help.

    Sometimes an ECU reset can help smooth an erratic tickover too.

    Google these for tuturials.


  • #8
    RobertM
    Registered Users, Registered Users 2 Posts: 481 ✭✭RobertM


    Try to reset the ECU

    1. Disconnect battery for 45 mins
    2. Reconnect battery, and turn ignition to MAR for 90 secs
    3. Turn off and leave 90 secs
    4. Start engine WITHOUT pressing throttle and let the car idle for 15 mins (I repeat, do not touch the throttle whilst the car is idling)
    5. Turn engine off and leave for 10 minutes
    6. Start the car and go for a drive, using a number of styles (eg town, motorway, thrash etc)


  • #9
    samsemtex
    Closed Accounts Posts: 935 ✭✭✭samsemtex


    RobertM wrote: »
    Try to reset the ECU

    1. Disconnect battery for 45 mins
    2. Reconnect battery, and turn ignition to MAR for 90 secs
    3. Turn off and leave 90 secs
    4. Start engine WITHOUT pressing throttle and let the car idle for 15 mins (I repeat, do not touch the throttle whilst the car is idling)
    5. Turn engine off and leave for 10 minutes
    6. Start the car and go for a drive, using a number of styles (eg town, motorway, thrash etc)

    No, i dont think that's right. Its this:

    800px-Konami_Code.svg.png

    :D


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