Help! my 03 Mustang jerks!

I need some information. I had taken my 2003 mustang into our local ford dealership to relpace the carbon canister and a sensor. They said that the reason for the service engine soon light comming on was a plugged canister. They replaced it and on my drive home (76km) the car "jerked" four times!. I took it back to them, they could not find any problem except for some "funny" code to do with removing the battery cables????. The drive home again produced more "jerking"! And today on the highway it again did quite a few "jerks" This happens sporatically not during any acceleration just at a steady driving speed. Please HELP I'm to leave on a 1000km trip in one day! I don't want to be stranded.

I need some information. I had taken my 2003 mustang into our local ford dealership to relpace the carbon canister and a sensor. They said that the reason for the service engine soon light comming on was a plugged canister. They replaced it and on my drive home (76km) the car "jerked" four times!. I took it back to them, they could not find any problem except for some "funny" code to do with removing the battery cables????. The drive home again produced more "jerking"! And today on the highway it again did quite a few "jerks" This happens sporatically not during any acceleration just at a steady driving speed. Please HELP I'm to leave on a 1000km trip in one day! I don't want to be stranded.


Jerked, jerking.... can you describe this more? also auto or manual?

Jerked, jerking.... can you describe this more? also auto or manual?

This is a v-6 manual. Never did this before until they changed the canister. They say it is not throwing out a code and that there seems to be no problem...ya right!

It does only about one jerk at a time as your crusing down the highway & doesnt matter what the speed. The jerk, jump, stumble however you decsribe it is noticiable enough that your pasenger asks if I'm doing that or is it the car?
Could they have installed a vacuum hose on wrong?

Well I made it to Beautiful Vancouver Inland, & discovered that the car does it's jerking only during snow fall. That is when the snow is falling and there is alot of snow being blown by other cars, my car will start the ocassional jerk. Like its pulling in snow throught the intake. Is this possible? I did check to see that they replaced the filter. Going through heavy snow will produce the jerks since snow is being thrown up by the cars front wheel, and through light snow expecially when I'm behind someone who is throwing up that wonderfull snow cloud!
I originally thought that maybe it did this due to high humidity,,,well i've been here on the inland for a week and a half and not once has it jerked.

I have to head back soon to the wonderful "cold" north. To get there I have to go back through the mountains passes. I hope I don't hit a snow storm 'again' but if I do it would be nice not to have the car go through its ornry 'jerks'!

Well I made it to Beautiful Vancouver Inland, & discovered that the car does it's jerking only during snow fall. That is when the snow is falling and there is alot of snow being blown by other cars, my car will start the ocassional jerk. Like its pulling in snow throught the intake. Is this possible? I did check to see that they replaced the filter. Going through heavy snow will produce the jerks since snow is being thrown up by the cars front wheel, and through light snow expecially when I'm behind someone who is throwing up that wonderfull snow cloud!
I originally thought that maybe it did this due to high humidity,,,well i've been here on the inland for a week and a half and not once has it jerked.

Do you have some kind of Cold Air Intake on it? I'm driving my GT in like 20 inches of snow here, and so far no major issues as far as the engine goes.

I have a K&N Filter and a homemade CAI, but it doesn't reach into the fenderwell, so not much chance of it pulling snow in (I hope) and we get some big frikkin' trucks throwing it at us.

snow doesnt get on your intake, my filter is exposed and none ever got on it, are you sure your cars just not losing traction... you are in snow, maybe you have bad tires

Thanks for the information on possible tire slippage!
First off....my tires are new, no there not winter tires however since I have lived in the north for well over 25 years, driven in snow you have probably never seen in your life not to mention black ice, wind storms and total white out conditions from heavy snow falls, I'm well adverse in winter driving. The differance between tires slipping and an unidentifed jerk, would have been the first possible senerio that I would have questioned!
Oh and not to mentioned , I have traction control on this car. If it was tire slippage this feature would have kicked in notifying me. And yes it does work properly, I checked it out.

Thanks for the information on possible tire slippage!
First off....my tires are new, no there not winter tires however since I have lived in the north for well over 25 years, driven in snow you have probably never seen in your life not to mention black ice, wind storms and total white out conditions from heavy snow falls, I'm well adverse in winter driving. The differance between tires slipping and an unidentifed jerk, would have been the first possible senerio that I would have questioned!
Oh and not to mentioned , I have traction control on this car. If it was tire slippage this feature would have kicked in notifying me. And yes it does work properly, I checked it out.

Well even with traction control you may be having a problem since the car is rear wheel drive with a front engine. I live in Washington and we recieve our fair share of snow and even with all weather tires you may not be able to get proper traction on ice with no weight in the back.