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Thread: 7mgte idle/vac problems

  1. #1
    Junior Member 1st year Apprentice
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    Default 7mgte idle/vac problems

    hi guys i have a 7mgte in my bundera, its been in for a while now and running fine until recently.

    its got some vac issue where it will running fine some times then it will start running really rough and die between gears or at the lights and then some times after long drives it will start revving harder

    the reason i was thinking vac issue was i can see the vac gauge drop when the issue pops up, but i would have thought if it was just vac it would be like it all the time

    this then made me think idle control valve, so i replaced it (with second hand) and now it revs it absolute guts out? so maybe this ones shagged as well?

    any one have any ideas on what could be causing this or had similar issues?

    thanks paul

  2. #2
    Junior Member 1st year Apprentice
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    Default Re: 7mgte idle/vac problems

    now it idling better but seems really rich on idle, blowing black smoke everywhere, still not driving right, it seams now as if the idle is coming up and down when back off

    i'm running out of ideas and starting to stress me out lol any help would be great

    thanks again

  3. #3
    senior backyard mechanic Grease Monkey legend's Avatar
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    Default Re: 7mgte idle/vac problems

    give the pcv valve and pipes a clean they can block up
    building my 4agte ae82

  4. #4
    Junior Member 1st year Apprentice
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    Default Re: 7mgte idle/vac problems

    alright ive cleaned the pcv system, the idle control valve and the maf sensor. its running heaps better, but now it got this weird thing where when there just a bit of throttle on (like cruising sort of throttle) it revs up and then dies and revs and dies again, so when driving it stutters and carries on to the point that it will actually stall

    any one have any ideas

    thanks paul

    edit: it also back firing a bit, sorta after reving it hard?

  5. #5
    Forum Member Grease Monkey
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    Default Re: 7mgte idle/vac problems

    how old are the vacuum hoses?

  6. #6
    Junior Member 1st year Apprentice
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    Default Re: 7mgte idle/vac problems

    id say they 90% would be original, that might be an idea i suppose, i'll see if i can replace them tomorrow

  7. #7
    Junior Member 1st year Apprentice
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    Default Re: 7mgte idle/vac problems

    fitted new maf sensor today, was sorta on a hunch as cleaned it again and it got worse, but its running like brand new now, thanks for the help guys

    paul

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