misfire [Archive] - Toyota MR2 Message Board

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hi hope someone can help with this i have a mk1 mr2 which has got a misfire i have changed the leads and spark plugs and still no joy i have also started the car and removed the leads one by one lead 1 when removed car idle drops ( which means its sparking fine ) lead 2 when removed car idle does not drop ( does give spark ) lead 3 when removed car idle does not drop ( does give spark ) lead 4 when removed car idle drops ( does give sparking fine )