Excel4600c and Travis, clean your MAF sensor.
MAF cleaning.
http://www.contour.org/mods/mods.php?s=howto&displayid=36
and
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=zetecmaint&Number=989728&page=&view=&sb=5&o=&fpart=1&vc=1
and from Autozone. In addition, you don't need to remove the clamp next to the upper air filter housing. Just spray through the housing. You do need to remove the clamp between the MAF and Inlet Air Duct (accordian tube?)
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/cb/25/0900823d801bcb25.jsp
In addition, Travis, did they just put in a plug on your tire. Might need to balance the tires and torque lug nuts to specs too. In addition, sometimes plugs cause bad vibration during high speeds.
