Hello all
My 1997 850 non turbo is giveing me a rich mixture code through my obd11 scaner.
What might the cause be, where should I start .The air filter seems ok. I am going to replace it with a K&N soon as I find the best price . I've justed replaced the plug wires, cap and plugs.
The rich mix bank one was comeing up before I changed the wires etc.

Thanks for any help

 

Checl really good for a vaccum leak.You can use carb cleaner while the car is running and spray the hoses.If you hear the idle change then there is a leak.
Check the vaccum elbow good on the end of the intake behind the power steering pump.They usually get a hole in them.

 

Thanks for the advice, there was a hole in the elbow I replaced it and the light on the dash has gone out . THANKS AGAIN

 

Im glad you figured it out.
Keep an eye on the ligth there is a couple of more elbows under the throttle cable cover that goes bad as well.You might want to check them as well.