i have a cel that comes on in my 98 2.5L atx. it tells me that it is running lean on both banks but the tip of the exhaust is black indicating that its running rich could this be an O2 senson problem?
1998 mercury Mystique
2.5L with that stupid slush box
only engine mod so far a optimized tb
dark blue with midnight blue leather interior
finnaly got rid of the door ding guards and pinstripe
