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  1. #1
    Saab Fan
    Join Date
    30 Mar 2019
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    Essex
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    13
    Saab(s)
    2008 93 estate
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    Tech 2 misfires

    Had a Tech 2 scan done at Abbott Saab last weekend to see if we can determine the reason for the slightly lumpy idle. No faults or fault codes detected but after a reset and short test drive there were an even amount of misfires on all cylinders, which slowly crept up by 1 or 2 as the car was idling. Plugs and coil packs are all new and genuine, but the chap couldn't throw any light on the problem. He agreed it should be smoother but was surprised how nicely the car drove (even commented he would definitely buy it if he was looking for one).
    So I am still scratching my head
    Any ideas guys? TIA

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  2. #2
    Saab Owner Digger's Avatar
    Join Date
    28 Oct 2016
    Location
    Minneapolis Minnesota
    Posts
    906
    Saab(s)
    2006 9-3 2.0t SportCombi
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    Even amount of misfires means common problem and the most common problem that comes to mind is fuel related and a few tank fills with a good crud and carbon removing additive could be the cheapest best cure for your rough idle.

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  3. #3
    Saab Fan
    Join Date
    30 Mar 2019
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    Essex
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    13
    Saab(s)
    2008 93 estate
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    Quote Originally Posted by Digger View Post
    Even amount of misfires means common problem and the most common problem that comes to mind is fuel related and a few tank fills with a good crud and carbon removing additive could be the cheapest best cure for your rough idle.
    That's a very good point Digger. Its had 2 tanks of high 97Ron through it with some Injector cleaner but maybe ill treat is to a TerraClean. see if that cures it

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