2003 4.6 rough idle

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Apr 13, 2015 | 05:41 PM

mainefordman

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Trailering

Joined: Jan 2015

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From: Madison

2003 4.6 rough idle

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

Apr 13, 2015 | 10:24 PM

Bluegrass 7

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

Apr 13, 2015 | 10:36 PM

mainefordman

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Trailering

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Posts: 15

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From: Madison

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

Apr 13, 2015 | 11:04 PM

mainefordman

Thread Starter

Trailering

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From: Madison

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

Apr 13, 2015 | 11:23 PM

Bluegrass 7

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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.

Apr 13, 2015 | 11:29 PM

sabir

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Joined: Apr 2015

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FORD EXCURSION 6.0 roughs with a lot of black smoke, have these codes

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

Apr 14, 2015 | 12:41 AM

Bluegrass 7

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Joined: Sep 2006

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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..

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Apr 19, 2015 | 02:05 PM

brokenleg

Fleet Mechanic

Joined: Jan 2011

Posts: 1,493

Likes: 21

Quote:

Originally Posted by Bluegrass 7

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.

Yep.

Apr 19, 2015 | 02:24 PM

#10

Bluegrass 7

Lead Driver

Joined: Sep 2006

Posts: 7,907

Likes: 143

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.