barnyard
06-08-2013, 01:06 PM
So I am brand new to this forum and I apologize for another rough idle post. I have searched through threads but have read so many different situations and solutions that I figured it makes more sense to provide all the info I can about my truck. Its an 07 5.4 f150 with 113k on it, I've had it for 3 months. There is no power loss, and most of the time it runs very smooth and quiet. A few weeks ago I found that after about an hour of highway driving it will barely idle when I stop but if I put it in neutral and rev it a couple times its fine. Its not throwing any codes. I changed the oil last week and used the recommended motor craft 5w-20. Now it takes about 30 minutes of driving or 5 minutes towing to idle rough, but its fine when I rev it up or dtive. Today it dies completely for the first time bit starts right up and runs perfectly fine. This all started before I ever towed with it. I checked the transmission fluid and its fine, not that I thought that had anything to do with it. I read somewhere that thicker oil helps because of some sensor and now I'm curious since my symptoms got much worse after my first oil change. Others have told me that it sounds like an egr issue and others tell me they idle rough...but I won't accept that they stall and idle this bad when most of the time it idles so smooth you can't here it. It also seems that this didn't start until it started getting warm out.
Any thoughts, I know many have had similar symptoms.
Any thoughts, I know many have had similar symptoms.