Misfire on cylinder 5 with p0174 lean code?

[jerrymdoty]

so my 98 ranger is misfiring and heastiaing really bad. I did a tune up and replaced the mass airflow sensor and it still did not help. i am moving onto the o2 sensors and fuel filter now. any ideas?

 

[stmitch]

If the only code is specific to cylinder 5, it's probably not something like the MAF or O2. Those would throw a general code for the whole system, or make more than one cylinder throw a code.

I'd start by checking the fuel injector on cylinder 5. Could also be something like a bad valve seat or broken valve spring but those aren't as common.

 

[Guanfy]

I'd also check the coil and wire going to cylinder 5. I imagine bad spark could cause misfire conditions.