Author Topic: 5.0 runs rich... (Read 4815 times)

93LXCONV · « **on:** July 23, 2009, 07:34:03 AM »

my 93 mustang 5.0 is failing emissions it is running on the rich side. motor is stock some bolt ons headers ..cold air ..stock mass air..motor is in great running condition runs great..but runs rich.. injectors are new ...19lb any help?

zebo87 · « **Reply #1 on:** July 23, 2009, 12:49:54 PM »

do you have cats. if not then thats your prob. also have you ran any codes and if so what codes if any do you get. could be bad o2 sensors.

Soaring · « **Reply #2 on:** July 23, 2009, 03:33:00 PM »

Bad 02 sensors would be my guess too. Run the codes...If it's not the sensors, clean your MAF.

93LXCONV · « **Reply #3 on:** July 23, 2009, 07:17:42 PM »

thanks ...cats are on the car....I will check the O2 sensors..at this time I do not have a code reader..who sells these... most stores sell readers starting at 1996 year...