i replaced my fuel pump in my cavalier z24 96 and its getting worse gas milege then a truck i put new o2 sensors in new map sensor and installed and air to fuel ratio and its runnin really rich what would cause this??
Possibly bad fuel injectors. Should have asked someone first before you started throwing money at it without having any idea what you are doing.
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
im going to move this to the maintenance forum, you should get more help there.
a wonky map sensor, or a bad line from it to the manifold can cause you to run rich.. only since you say you replaced the MAP sensor.. just a shot in the dark really..
Also, check to make sure the vacuum line going to the fuel pressure regular is connected to the throttle body, and there aren't any vacuum leaks.
2010 Subaru Impreza WRX Limited
1999 Cavalier Z24 Supercharged
1999 Grand AM SE (Beater Car)
1997 GMC Sierra
2007 Honda CBR 600RR
2005 Honda TRX450R
