Quote:
Originally Posted by luiscompean
After installing bbk long tube headers and bbk high flow performance xpipe on my 07 mustang gt the check engine light came on and the p0300 and p0302 dtc codes came up now I know the cylinder two is suppose to be misfiring and maybe another cylinder also but all this happened tight after I installed the headers Nd xpipe. Does anyone know what could be causing this issue? And does anyone know how to check if the o2 sensors are working properly? I also have installed ford racing performance spark plugs. Any help and/or advices will be greatly appreciated
|
You may be too lean, or may have a fuel pump problem. Using your SCT you can datalog fuel pump duty cycle, fuel rail pressure and if you want to check the O2's you can too, you will see them switching around 0.45V once in closed loop (up to after 60 seconds of startup depending on your coolant temp at startup)
Quote:
Originally Posted by 2007VistaBlueGT
P0300 is random misfire. the DTC light will come on when ranodm misfores occur or the PCM can not identify misifing cylinder.
Possible causes.
• Camsahft position sensor
• Low fuel ( less then 1/8 tank)
• Stuck open EGR valve
• Blocked EGR passages.
One or more EGR passages may be blocked or partially blocked. If this is the case the misfire detection monitor indicates the EGR port to check for possible blockage.
|
These cars do not have EGR.