So as some may know, I was having the engine issue, took plugs 7 and 8 out re screwed them in and torqued to correct Ft torque no more stuttering.. can't budge CYL 1 Spark plug( Just replaced all plugs) now the codes are reading Misfire 8, 7, and 1 and bad Heat OXYGEN sensor (no code until replaced plugs)??? Any clues you guys?

 

Not sure what year you are wrenching on but here is my thought. My 97 4.6 had a misfire on 2 plugs. It has coil packs. I cleaned the connections on the packs. Used an ohm meter and found 1 wire that was open. Changed all the wires, used dielectric grease and issue solved.
As for the O2 sensor. Maybe due for a change. Vacuum leak can cause lean conditions.lean conditions caused by the EGR passage being blocked.
Just random thoughts.

 

Is the IAC and EGR hard to clean?

 

The IAC is 1 plug and 2 small bolts. Very easy.
The EGR is a little harder. Be very careful removing the 2 bolts that hold it to the intake. They break off easy. I know from experience.
The nut for the tube that runs to the exhaust manifold I think is 1''.
If you look into the throttle body by opening up the butterfly. Use a flashlight to look in, you can see the holes. Use throttlebody cleaner to soften it and something thin and strong to get the junk out.

 

Do I need to take my cover off?

 

Yes to look into the throttlebody.
I think you can search EGR cleaning there are many that have great detail.
This group has a lot of sharp people helping us out.

 

Yea...thanks man

 

No problem. Hope it helps and good luck .