Mercury Cougar Engine Rich

I Have A High Performance Clutch Installed And A Ram Intake Installed And Dual Exhaust (don't Know If These Are The Cause, But...) : My...

Ok I Dont Understand The Oxygen Too Rich... So Please Inform. I Been Getting To Different Mechanics Telling Me Many Different Answers And B...

Dumping Fuel, Replaced All Spark Plugs And Fouled Out To The Point She Would Not Start. Did Top End Cleaner Through The Throttle Body With...