2005 Ford F-150 Q&A

2005 Ford F-150 Question: 2005 ford f150 will not pass or fail emissions

Not throwing any codes but will not pass or fail emissions. Ford mechanic cleared the brain but still nothing. -
Answer 1
not familiar with emission there. you say he cleared the computer. find out if he reset the keep alive memory. that resets the computer on the fuel learn table. the vehicle is then driven and relearns the way it is driven to set the fuel trims. -
Comment 1
yes he did. thank you. went ahead and replaced the imrc for the heck of it but still not passing. thank you. -
Comment 2
how many miles? may have a weak catalytic converter. -