1. Holmsey

    Holmsey Member

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    Finally hooked up a vacuum gauge the other day. At tickover the vac is low and needle sits in the red, a slight increase in revs and it just about goes into the green.
    The red says late ignition timing. So can I advance the ignition timing on the cam belt?
    I did fit a new cambelt when I built the engine up, maybe I have not lined the marks up 100% though I thought I had. Could this produce this problem? Any help would be much appreciated.
     
  2. Zuffen

    Zuffen Super Moderator Staff Member

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    If you move the cambelt you will shift the timing but also the cams.

    I'd chedck it is in the correct position and correct if not, then see what you have.

    My tired 250,000k engine runs almost 21" vacuum at idle and drops as a soon as I crack the throttle.

    I seem to drive a 0" vacuum because I drive it WOT.
     
  3. gloverman

    gloverman Well-Known Member

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    What is your ignition timing sitting at? Its just an engine so all the same stuff applies. Grab a timing light, put onto base timing mode and check it like we have been doing since engines were invented.
     
  4. Holmsey

    Holmsey Member

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    Thanks for the replies. I will use my timing light see what is says.
    I did check my cam belt timing a while back as it was suspected I had it wrong, as it doesn't like ticking over when cold.
    I will take my time this time and check thoroughly.
     
  5. Holmsey

    Holmsey Member

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    It is 9 degress BTDC on tickover, 27dgrees full advance. I marked the cams and I may have the marks slightly off. They look bang on static, but when I checked with the timing light they looked more lined up at 7 degrees BTDC.. Maybe moved when tensioner was put on?
    Guess to alter I need to take it all back off as if doing a new belt again... "Groan"
     
  6. gloverman

    gloverman Well-Known Member

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    Did you put the ecu into base timing mode when you checked the ignition timing?
     
  7. Holmsey

    Holmsey Member

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    No I didn't, is that what I should of done?
     
    Last edited: Oct 3, 2018
  8. gloverman

    gloverman Well-Known Member

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    Yes. The correct way to check the timing is with TE1 and E1 bridged.
     
    galooph and Holmsey like this.
  9. Holmsey

    Holmsey Member

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    Ill give it a go ;o)
     

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