I just got home from a odd trip back from work. I was sitting at stop light after driving for about 3 miles with traffic coming up fast behind me. I thought I'd punch the throttle so I wouldn't get swallowed up you know.

The truck initially pulled hard and then for some odd reason it let off like it was going to stall, then immediately started pulling hard again. It jumped into second gear and again felt like it was going to stall and then back to pulling hard into 3rd. I let off the throttle and it behaved fine with light acceleration. I couldn't hear anything griding or anything sounding bad so it don't suspect a transmission problem and all my shift points sound fine. I got off the main road into a a gravel road and came to a full stop to recreate the situation. It did the exact same thing again. The truck never threw any codes on my edge tuner. So I'm stumped here.

I'm thinking maybe the weather might be creating problems with my S&B CIA since it's rather chilly (mid 60's) for the first time since I installed this CIA. Or maybe I got some bad fuel at the bottom of this tank. I am sitting on near empty. I'm going to reflash back to stock and refuel with some injector cleaner in the tank and see how she acts.

Anyone have any thoughts or experience with this problem?

 

My 06 5.4 is doing the same thing only at 1/4 throttle.I think you explained it better than in my post in this section.I will wait with you..

 

The low fuel alert came on as I was going to the gas station. This is a different station that's well away from my normal station station on the Air Force base. I put a half tank of premium so when I put in some injector cleaner it'll be a stronger concentrate. Anyways I took the truck out for a few test runs last night and it didn't choke out this time so maybe I had bad gas. Going to keep close tabs on it today and see what happens.

 

Read this about the saga of this problem with my truck...
https://www.f150online.com/forums/sh...d.php?t=293085

 

yea I was seeing that. Sure hope I don't have that big of a problem out of warranty. I drove it into work today and after the engine warmed up I tried to recreate the situation. The truck performed just fine then. When it started acting up it was easy to get it to bog down. One thing that I do notice on shifts I get a belt sqeal. If it does act up I'll have the tuner record the data stream so maybe we can figure this one out.

 

Impact9, Be advised or warned some injectors can not and should not be cleaned. The ones that can have a belt line around the waist of the injector and are usually bosch style which means they work like a pen. The other which ford like Gm uses alot are called directional plate injectors that do not work like a pen. Any injector cleaner will destroy the injectors windings and will go bad about 3 to 6 months later. Now, ford nor gm will tell you this because they want to make money off of your lack of knowledge. Second, to be on the safe side, you need to scan your data stream and make a sweep of your TPS and make sure there are no flat spots while veiwing a live image of the stream. Third, test your fuel pump to make sure your dead head pressure is high enough because on acceleration a loss of dead head will result it a stumble. You may have just had a loss of fuel issue do to no fuel at the pick-up in the tank! Maybe this can help you get a few other components ruled out. Don't throw parts at it!!!! Note: If you do have an injector(s) that can be cleaned, use what most dealers use and it's called BG-44K but be advised, you can only use it once a year because it cleans too well. About $25 @ car quest, BMW, Jeep, or GM.

 

If you had barely any gas in the tank that was probably what it was.It very well could have been low enough that it was starving the fuel pump and engine by punching it!!That would be my guess since after you put gas in it the problem went away.

 

yep thats it, I was told do not go WOT with less then a 1/4 tank One time I pulled in to a Sunoco they where out of 93 oct so I left and pulled on to the hwy going 60 MPH same thing happened Let off as soon as possible because you are lean lean lean. at that point and it can actual damage your fuel pump,
suck the dirt off the bottom of tank, you should change you fuel filter now also I have changed mine twice and both times it was hard to blow though My truck has about 12000 miles on it now

 

^^^ X3 ^^^^ Great advice.

 

Thanks Okieboy. I changed the monitoring on my edge to track fuel pressure and spark advance. So far since I filled up everything has worked fine. Even though this is the first time I had this problem running when running low on gas. Guess I'll just keep in mind to fill up a bit sooner than I normally do.