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Misfires

(1990 Cadillac Seville)
in Columbus, OH on October 30, 2010
My 1990 cadillac Seville will miss and backfire causing my muffler to blowout.i have have changed dist. and cap,dist.plugs,wires and coil.
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Popular Answer
Check your timing. Make sure that your timing is correct, also I would check the timing chain or belt, and make sure that it is not slipping causing your timing to come off.
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