I bought a saab 9000 for the winter.very comfortable kfz with a lot of frills in it. it only accelerates very leisurely, stutters in the stationary gas and if you want to accelerate strongly, it swallows itself immediately and jerks the same. the visit to the boschdienst was also almost for nothing, since the 91er can not be read with regard to motor control. the exhaust probe put into the exhaust – it runs much too fat. that can have of course several causes.on the red box is the right kun fabriciso erupted and the spring in the plug is missing too. but this spark plug looks just like the 3 others.I wanted to buy only a new exhaust in the car and not invest according to the error rule. it is a 2.3 16V turbo.I need a constructive advice. thanks in advance