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Powertrain: exhaust gas recirculation (egr) flow insufficient. Would you jump right to the egr valve or could we have a plugged catalytic converter? I live in Kentucky now and have had plugged converters, rusted fuel tanks, frozen brake calipers, etc. since I moved from high and dry Colorado. It started running rough at an idle today and threw this code. One other thing it has going on that Ive never seen before: the rear differential is spitting out 90weight; very odd. Thanks for any help, Marty
