2000 ford mustang code 453 and missfire cyl 5 where is the cyl

misfires can come from faulty injectors, low fuel pressure in the manifold. timing , blocked exhaust. faulty o2 sensor, leaking inlet manifold gaskets, faulty valves (burnt) It is not always plugs and leads. Have a fault code reading done.

The page LINK here is the best i have read on misfire diagnosis, it is protected so I can't copy it but you can go to the link.

misfire can be caused by your fuel injectors also

po305 is related to missfire on #5 cylinder
po440 is related to fuel tank pressure
pO441 is for evaporator purge flow malfunction
po446 relates to vent control valve electrical circuit malfunction

missfire is seperate from the other codes
as for the other three codes replace the vent control valve solenoid located near the charcoal canister the oth3er codes can relate to a faulty solenoid

after replacing light will only go out if you clear through a scan tool or three drive cycles of over 10 min each

That is normal
Not likely #5 & #8 all the time. Don't go by codes you get. Walk a new coil,until you find bad one

If you got a PO305 Code Replace COP Coil #5
You don't need a dealer
You will be doing a lot of them,as time goes by.

I get so frustrated with this dealer thing.
I have a Lincoln LS, that is by far the most complicated vehicle ford ever dreamed up.
I have done 2 coils this year,at $59.00 each.
Some people on this site, are up to $5000.00 at the dealer, and not had one issue repaired yet.

If the misfire is real bad ,you may have to walk the new coil from one cylinder to the next until you get the offender. In that senerio,the PO 300 Codes won't always work.

Let me know how your doing. Please do your own work. Your dealer proved to you, they can't help you.

Hi.

Please click here and read the article I posted about P1775, P0700 and P0305 are consequence of the first code.

Regards.

Ginko.

codes need to be erased you tripped a code
go to your mechanic and give him a couple of bucks to clear the codes

ur engine is a v6, the head that has the number 1 cylinder is bank 1, so u need to go to the second head and follow the exhaust line, ull find a sensor there, probabbly has 4 cables looks a lot like a spark plug, thats ur oxygen sensor, that probabbly needs to be replaced.
hope this helps
have fun!

Cyl. 3 missfire. check your plugs or the coil and boot.