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Code P305 The CEL light came on today I took it to Auto Zone to read the code, it's a P305. Also said the 5th cyclinder isn't getting a spark. I've already replaced the spark plugs, spark plug wires and coil pack. What do I do now?

It's a 4.0 liter engine.

Where is the EGR valve on a 2004 Ford Explorer? Is there a way to check this to see if it's my problem now? My check engine soon light came on a few weeks ago, took to auto zone, had the code read, misfire on #5 plug so, replaced plugs, plug wires and coil. the light is out now and hasn't...

Where is the IAC? Could the problem possibly be an EGR valve or a DPFE sensor? And, if so where are these located? Thank you all for your help with this, it's driving me nuts!

Also, forgot to ask. Can the error codes still be read if the CES light isn't on?

I cannot remember what the code was at the time. The folks at Auto Zone said it was a misfire on #5 so, I replaced both the plugs and plug wires and then the coil pack. After that, the Check Engine Soon light went out, once the computer was reset at 55 mph and has not come back on since I...

I have a 2004 Ford Explorer. About a week ago, my CHECK ENGINE SOON light came on. I took it to local Auto zone to have the code read. They said it was a mis-fire on #5 cylinder, we then replaced the plugs, plug wires and coil. The Check Engine soon light is not on now but, when I first...