I have a 2003 f150 4.6 with a rough idle. I've changed mass air sensor and idle air sensor. Any ideas?

 

Is the check engine light on?
What codes are set?
Your changing part without any proof you need them.
Good luck.

 

I did get codes for mass air and idle air sensors. No CEL

 

Whoops meant idle air control valve not sensor. To much on my mind.

 

Clear the codes, drive it and and see what comes back so you start over.
Codes for those parts should have lighted a CEL.
At the moment you don't know what the situation is.
Good luck.

 

Can you help me to figure out these Diagnostic Trouble Codes, please?

Code-1
P0113: Intake air temperature sensor 1 circuit high input
Code-2
P0275: Cylinder 5 contribution balance
Code-3
P0404: Exhaust gas recirculation control circuit range performance
Code-4
P0603: Power train control module keep alive memory (KAM) error
Code-5
P0672: Cylinder 2 glow plug circuit
Code-6
P1102: Mass air flow sensor in range but lower than expected
Code-7
P1335: EGR position sensor Minimum/Maximum stop performance

 

You need to go to the Diesel forum.
This is the gas motor forum for 97 to 03 years.
From the looks of the codes you have a harness issue of some sort for so many codes.
Good luck..

 

Could a bad fuel filter cause the rough idle

 

Yep.

 

I got a reply but it does not show up in the thread.


x06, x06, x06.
Is that for this thread?
If yes are you saying 306?
It's misfire cylinder 6.
That sure will cause rough idle.
It pays not to run with to much old history after confusions sets in.
If not disregard the above.
Good luck.

 

I found the 90 deg boot to the pvc valve broken, replaced and cured.