I just bought a new to me 06 automatic with the 4.0 in it. It has 32,000 miles on it. Here's my problem, when I take off from a traffic light itlunges forward likeit's gonna go and then just about dies.At first it only started on an incline, and now it does it on flat ground too.When I say take off, I'm talking about taking off at about 2000 rpms, not racing someone. The best way to describe it is like missing a shift. Has anyone else had this problem? I searched on here but didn't find anything on this problem. Thanks in advance!

Hap

 

could be the dreaded "throttle lag". Apprently our cars may hesitate - something that can be a result of programming and the drive-by-wire throttle, but anyway, autos tend to feel it more than manuals. i've got a manual - I get a hesitation every once in a while, sometimes the car feels like it doesn't get up and go like "normal" cars would, even though I know its really capable of doing so. If you get a chance to though, try checking your intake and throttle body to see if they're dirty.

 

I just bought? Take it back if you just got it and if you got a 30 day guarantee? Gas Filter problem maybe? sorry my 2 cents sucks

 

Yeah, bought it March 1st. I called the dearlship and am taking it in on Friday.

Dan, I saw the thread on "throttle lag" but it seemed like it was a problem when cruising down the road at speed. If this is the problem, all I have to ask Ford is wtf?This thing just about stalls out when taking off. The only thing that I have found to help alleviate the lag is to put it neutral and rev it to 3 or 4k before the light turns green. Each time I've done that, no lag. Intake and throttle body looked good, air cleaner is pretty clean too. I'm gonna fabricate my own K&N cold air intake for it at some point.

 

checking with the dealership is your safest bet. good luck - hope it isn't anything major!

 

Fuel filter or fuel pump is my guess. There is actually a TSB on 05-06 fuel pumps.

http://www.2005stang.com/gallery/alb...hesonaccel.pdf

 

Barry, you're the man. I commute 75 miles one way every day to work, and after about 50 miles I hit the 1st traffic light and after that each time I stop I get the hesitation. I'm gonna call the dealer tomorrow and fax over that sheet in your link and tell them to have the parts ready for Friday. Thanks!

 

Let us know how it goes. BTW, congrats on your new Pony.