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  1. #26
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    I also had sometimes hickups, mostly higher in the revs. These came from the two relais against the plate between engine and passengers. One of them was not always making contact. Only found the source of the problem when it totaly gave up.

    Just over the strutbrace, if you got one fitted, they are next to each other.
    155 Q4 wb 1995
    S2000 2005
    V70R 2005

    www.alfa155club.nl

  2. #27
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    could you post a picture of them? If i understood well, one fo those two relais is the one for the injection?
    Nick

  3. #28
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    I borrowed a picture from a faster Q. But location is the same.



    Them failing a bit would cause a drop in fuel pressure.
    155 Q4 wb 1995
    S2000 2005
    V70R 2005

    www.alfa155club.nl

  4. #29
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    I've known those relays and the loom to them to cause a complete breakdown that took forever to find. They seem to be the first to suffer the ageing looms this old suffer. I'd check what the pressure was doing at full engine load.

  5. #30
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    I think one of those relays is for the fuel pump.

  6. #31
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    One for fuel pump relay and the other for injector control.

    wrinx
    My Q4 in the Garage

    www.alfaromeo155.co.uk ............................ □□□-V-□□□ .................................. www.ilmostro.co.uk

  7. #32
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    Yes, I thought they were the one.
    Strange symptom the 'hickups'!!!!
    Nick

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