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I am throwing a P0401 , P0430, too lean, and several misfires.

(1999 Ford F-250)
in Dandridge, TN on April 05, 2014
I changed all O2 sensors, and EGR valve about 9 months ago before finding a vacuum leak. CAT is not rattling. Any ideas?
Displaying 2 answers & 3 comments
Popular Answer
on April 05, 2014
What makes you think it's running too lean?
on April 06, 2014
it was throwing a code for a too lean condition
on April 06, 2014
Oh ok, you just didn't list any of the lean codes is why i ask!! It's possible one of the coils may be breaking down causing misfire.,.
of G. T. Service Center on April 05, 2014
MAF; clean it or replace it, possible plug wires as well.
on April 06, 2014
Thanks I will try it next.
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