Not sure what the hell is goin on but, ive only had the car for about 24 hours and when im goin about 40 miles an hour or so and i give it even the least bit of throttle, the back end starts rumbling like im goin over really small speedbumps or a really rough road. The car also had some small backfires earlier today and im not sure what could be causin this. Id like to know if its something serious or if just a tune could fix it, becuase i have 2 days left before i can return it.

 

Take your car back to the dealer and trade it for a Lightning

 

What kind of car is it
Mike

 

It's a L guys. Sounds like you need to take it back and show them the issues. Ask if they will have it fixed at a local Ford/SVT dealer. If not, just return the L and start hunting for a new one.

 

White
Both issues you descibe can be very serious, (maybe not, but def can be).
IMMEDIATELY go back hand them the keys and tell them there are at least "2" serious issues with this vehicle and "YOU ARE" returning it .

"IF" they fix both issues, AND GRRTNY it, then you will consider taking it back...

 

Could possibly be a O2 sensor or two failing. Mine went to junkon my truck and it would do this at tip in. It would also go lean on the wideband while doing this.

 

this could be something simple also, i remember in my old 99 explorer, my tire threw a weight and when i hit a certain mph, the car would shake pretty bad, so see if your tires are all balanced correctly.

 

I agree 100% with Both of you
But what if the rears shot and he's got a valve trane issue ???
(or is that train, woo woo........)

If I had two days left I would DEF go back and say no thanks
UNLESS you can fix and grrnty the fix

 

definately return it and tell them to fix the problem.

 

mine did it new b/c the dealer put 87 in.

return it either way and wait for a better one.