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diognostic code reading? 200 1990

posted by  panelmon on  Fri Sep 13 12:06 CST 2013
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last visit: Fri Aug 1 06:16 CST 2014
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Thanks a million, Machine Man!! I did put in new Bosch copper super plus wwr7dc plugs, cap, and rotor. I also found 2 loose nuts at manifold to take-down pipe! I'm thinking that gave O2 sensor a lean mix reading, is reading between .40 and .55 now, and fingers crossed, no CEL! Drives much smoother now.I also have no EGR to worry about.Now my only code is 3-1-1 ( missing speed signal).Thanks again for all your help!






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