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  1. #1
    Saab Fan
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    05 Mar 2011
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    Saab(s)
    2007 93 aero
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    2007 aero Hesitation

    I have a 93 aero 2007 all standard the idle is not very smooth and when accelerating you can feel the engine hesitating.
    i have had new plugs and cleaned the maf today and a recent service so i am now stuck for ideas apart from goto dealers which i didnt want to do

    any help would be great
    thanks

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  2. #2
    Mike
    Moderator Shazam's Avatar
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    30 Jul 2010
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    Rochester, New York, USA
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    Saab(s)
    1973 96
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    Sounds like a vacuum leak. Check all your vacuum lines, and see if one is cracked or rotting out. Sounds early for an '07 for a vac leak though.

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  3. #3
    Jose Luis
    Saab Addict jlrSAAB's Avatar
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    Saab(s)
    2007 93 Aero 2.8 V6
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    Saab2007 welcome to SW.

    please let us know more details about engine type (2.8l V6, 2.0T.. TTiD...), miles on it.. the new plugs type so we can help you.
    Thanks



    Quote Originally Posted by Saab2007 View Post
    I have a 93 aero 2007 all standard the idle is not very smooth and when accelerating you can feel the engine hesitating.
    i have had new plugs and cleaned the maf today and a recent service so i am now stuck for ideas apart from goto dealers which i didnt want to do

    any help would be great
    thanks

    0 Not allowed!


  4. #4
    Saab Fan
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    05 Mar 2011
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    Saab(s)
    2007 93 aero
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    Its the 2.0 T aero

    the plugs where the NGK PFR6H-10

    since the service and plug changed all seems to be running better apart from the hesitation it hesitates between 3-4000 revs mainly but you can notice it at diff revs but not as much and as i say the idle is not great. i will check hoses tomorrow for leaks.

    it has 52000 miles and when i changed the plugs the outer edge of the plugs had soot on them but not on the node and the exhaust is also black with soot

    thanks

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  5. #5
    Jose Luis
    Saab Addict jlrSAAB's Avatar
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    26 Oct 2010
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    Saab(s)
    2007 93 Aero 2.8 V6
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  6. #6
    Saab Fan
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    2007 93 aero
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    Quote Originally Posted by jlrdrony View Post
    sorry that was the ones i put in ngk pfr6t 10g

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  7. #7
    Jose Luis
    Saab Addict jlrSAAB's Avatar
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    Saab(s)
    2007 93 Aero 2.8 V6
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    get higher octane rate and change of petrol station.

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  8. #8
    Saab Fan
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    Saab(s)
    2007 93 aero
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    Quote Originally Posted by jlrdrony View Post
    get higher octane rate and change of petrol station.
    i have tried shell petrol for the last few tanks but still no change

    i normally use 95 octane but have tried shell v power which is around 98 but i have been using 95 for ages with no problems.

    i have checked for leaks today and nothing stands out there is what sounds like a leak coming from the metal pipes next to air filter and engine but im not sure if this is anything to do with the turbo

    thanks

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  9. #9
    Jose Luis
    Saab Addict jlrSAAB's Avatar
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    Saab(s)
    2007 93 Aero 2.8 V6
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    some questions:
    are you a city driver? I mean your ride for short distances...
    do you know how much percentage of biodiesel in the gasoline contend is allowed in the UK? i.e. in Spain 7%, France 5%, and somewhere else 30%.
    biodiesel is not good for gasoline engines produce a lot of moisture and pollution in the spark plugs.

    I use for the Astra 2.0 95 octanes with no issues and for Saab 98 octanes.

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  10. #10
    Saab Fan
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    14 Mar 2011
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    NOVA... mclean va
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    Saab(s)
    04 9-3 ARC
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    What kind of hesitation are you experiencing? a more common problem with the 2.0s is the standard coilpack blow and cause motor hesitation when accelerating. the hesitation that you can experience is like a stutter or a misfire.
    pull out your coil pack and pull off the rubber igniter line look for any cracks next to the igniter all my blown coils had these cracks along them

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