potatonet 0 Posted June 30, 2004 I have a 90 G60 and my MPG on my MFA now displays 99.9 and I cant figure out why? is it my O2 sensor? I hope so cause my engine runs like crap. Share this post Link to post Share on other sites
Roger Blassberg 0 Posted June 30, 2004 sounds as though a small-bore vacuum hose has developed a leak or has come off altogether, messing up all sorts of control systems. Best wishes RB Share this post Link to post Share on other sites
VR6 0 Posted June 30, 2004 Search for "99.9" and you will find previous threads with advice. Share this post Link to post Share on other sites
