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    99 tahoe backfire

    Hey can anyone help me with a 99 tahoe backfire I'm going to post a video but first let me explain. I have changed fuel pump, upper intake manifold gaskets, lower intake manifold gaskets, distributor, ignition coil,tps,iac,maf,iat,sparkplugs,wires,crankshaft position sensor,did a new oil change...
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