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I have a 89 bronco with a 302 it is running really rich and i don't know why i have replaced the eec,o2 cenc,map cenc,egr valve pcm,checked all vac lines,fuel pres. is good at rail and full tune up any idea's.I took it to the dealer and had them do a diagnostic they didn't find ant thing they told me to replace the pcm because the motor was changed from a 351 to a 302 |