I've got 265,000 and I have done a lot of work but I haven't seen this many codes at one time. I have P0301-8, the p0401egr code, and then I have a code that I can't remember I think it is P0415 and it said a hose is off or something like that(not exactly sure because the parts guy insisted on holding the reader and kept getting in the way). When I am driving it basically feels like the motor dies and instantly start causing a hesitation then jerk. It won't hardly pull a steep hill. It is worse with A/C on.
My question is do you think a new set of COPs and plugs might solve the problem? Could all of them flake out at the same time or do I have some bigger electrical problem?

 

Please list all the codes by number. Sometimes this is caused by a blown fuse, other times by a problem in where the main wiring harness goes through the firewall.

 

p0301
P0302
P0303
P0304
P0305
P0306
P0307
P0308
P0402.
I don't know what the last code was. I will run by a different parts store tonight and see what codes it threw on the way home.

 

Ok I drove around until it threw codes, here is what I have

p1000
p0401
P1405
p0300
P0401
P0402
P0304

 

Start with a new Motorcraft DPFE sensor, reset the codes, and test again.

 

I looked at dpfe to make sure hose isn't rotten. I had already ordered a set of COPs so I replaced #4. I always unhook battery when I do that so afterwards I drove to parts store and it isn't missing or throwing codes so I'm going to hold off on throwing any other parts at it until it throws codes. I know it needs a TB cleaning but that is something I don't have the time to do myself.

 

Aren't the 4.6s prone to clogging up under the throttle body where the egr passages are? cleaning that out may be the only way to get rid of the egr code.

 

He has codes that are directly contradictory (P0401 and P0402). You cannot have both excessive and insufficient flow if you have clogged EGR passages.

The factory sensors of that era were so prone to failure that Ford issued a TSB telling dealer techs to automatically replace them FIRST, then see if anything else was amiss whenever an EGR fault code was found.