Rough Idle, Lean Code..Help!
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Rough Idle, Lean Code..Help!
My 04 F150 has started having a rough idle. While in park the engine will stall out with the A/C off. Also when in drive the truck will idle close to 1000rpm's. I had to the fuel filter cleaned and also the MAF sensor cleaned. Also did a vacuum check on it. Pulled the code and it's throwing a Lean Code. What else should I be looking for? Thanks
Postmaster
Joined: Jul 2010
Posts: 3,743
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From: Henrico, VA
Did you clean the fuel filter or replace it? These filters are recommended to be replaced every 24-30k miles on them. If you did replace it make sure they put the right one on. There are two filters for these trucks and people have installed the wrong one before.
Other then that I am at a lost as to what else to tell you to check.
Other then that I am at a lost as to what else to tell you to check.
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I have a 2004 F150 with 96,000 miles. I have been having issues with it throwing lean codes, occasionally having the check engine light flash (a bad thing), and missing.
Changed the sparkplugs
Changed the fuel filter
Changed the cam position sensors
I had the Ford Dealer do the dianostic check and they said only thing they could find was noise from the cam phasers, and would cost $1400 to replace. Been doing some research and getting a mixed bag or results with the cam phaser thing. I am wondering if it may be the VTC solenoids that control or supply oil pressure to the cam phasers. Those are something I could handle and would be a lot cheaper than replacing the cam phasers, just not sure what direction to go at this point. Sometimes the truck runs fine, other times, it misses and runs rough.
Changed the sparkplugs
Changed the fuel filter
Changed the cam position sensors
I had the Ford Dealer do the dianostic check and they said only thing they could find was noise from the cam phasers, and would cost $1400 to replace. Been doing some research and getting a mixed bag or results with the cam phaser thing. I am wondering if it may be the VTC solenoids that control or supply oil pressure to the cam phasers. Those are something I could handle and would be a lot cheaper than replacing the cam phasers, just not sure what direction to go at this point. Sometimes the truck runs fine, other times, it misses and runs rough.
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New User
Joined: Feb 2009
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From: escondido
cam sensors
what and where are the cam position sensors? I have changed my solenoids but still throwing a P0012 and have a rough idle
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From: Fayetteville
Do you have a K&N or similar air filter? If so, get rid of it, then remove the throttle body and thoroughly clean it with carb cleaner and a tooth brush.
These filters allow the oil & dirt to build on the TB.
I replaced the MAF & TPS to no avail. Was looking at the EGR etc. By luck, I was talking about this at lunch, another worker heard and pointed me in the right direction.
So come that night, 20 minutes & half can of carb cleaner later, problem resolved!!!
Hope this helps!
These filters allow the oil & dirt to build on the TB.
I replaced the MAF & TPS to no avail. Was looking at the EGR etc. By luck, I was talking about this at lunch, another worker heard and pointed me in the right direction.
So come that night, 20 minutes & half can of carb cleaner later, problem resolved!!!
Hope this helps!
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litt810
1987 - 1996 F150 & Larger F-Series Trucks
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Feb 25, 2005 10:54 PM
