Mis-fire causing boost cut

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  • kwlw
    S2Forum Extremist
    • Sep 2004
    • 1025
    • Country: Lithuania
    #16
    Originally posted by Bjoern
    I will try to go on 92 octane fuel next time. If it helps, then I know where the problem comes from.
    Be carefull with the boost and 92. Especially when you suspect knock sensors not working properly. The results can be demolishing.

    Sau
    200 20vt 88' 3b, human carrier
    CQ typ85 with AAN inside, see project blog at http://kwlw.blogspot.com

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      • Bjoern
        S2Forum Buff
        • Jan 2006
        • 35
        • Country: Denmark
        #17
        Thak's for the warning. I'm disconneted the knocksensors and go for a ride. The car go wery bad. Then i reconnect them and get som 92 octane. Now i have go 200 km. without problems.
        The car is a bit slow, but it drive smooth and without cut the problem.

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          • S2central.net
            Retired OG Mod
            • Jul 2003
            • 16590
            • Country: Northern Ireland
            #18
            MAF - I had months of this pain on mine - it would be fine some days, then rubbish on others... Seemed to be worse at high temps. No fault codes ever... Changed the MAF to a spare and its like a different car.

            At high temps I know my original coils and HT stubs (ABY) are causing a lil grief with misfires but I don't get the cutouts anymore.

            Borrow a spare MAF or airbox if you can - the MAF is an expensive booger to change on a whim. Oh and be sure to reset the ECU first - just in case its running a funky/safety map cos of bad values from the MAF.

            Paul
            Paul Nugent
            Webmaster http://S2central.net
            Administrator http://S2forum.com

            1994 S2 Coupe ABY - aka Project Lazarus
            2001 A6 allroad 2.5TDi - family tank
            2003 S4 Avant 4.2 V8 - daily burble

            Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

            There are only 10 kinds of people that understand binary - those that do, and those that don't

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