bkg97gt

My car is a 1997 mustang Gt and the check engine light came on after i noticed a miss and while in park the car hunting for idle moving up and down from 900-1200, after scanning it the code returned was for multiple cylinder misfires. After checking the plugs i found #7 and #8 were dead. I chaged all the plugs and inspected the wires and also cleaned out the IAB solenoid. then turned off the code and went out for a ride. Car idled a little better but not perfect still hunting a little.After 30ish miles the light came back on, rescanned and now it says EGR insuffeciency and Catalyst effiency below threshhold bank 2. So now im confused and wondering what i should do.....

thanks for any help
Brian

bkg97gt

also the car is completly stock

bkg97gt

anyone?

40thGTKB

did you check your COPs?

bkg97gt

yeah it doesnt have a misfire anymore, they were in fine shape and everything. the codes it showed after fixing the misfire were for the EGR and Cat inefficency bank 2

98SN95

your cats are clogged