Switch the two front wheels, left to right, then see if the pull goes the other way. If it does, you will also find it pulls in the opposite direction when braking. That combination of observations is due to unequal rolling resistance of the tires, and is often solved by switching them front-to-rear, then leaving them there.
Also, if you have a printout from the alignment, post the numbers for "camber", "caster", and "toe", front and rear, and I will interpret them. Cars today are very picky with those adjustments, and every alignment computer can read to.01 degrees. That is a huge improvement over the plus or minus 1/8 degree older stuff could read to. Many mechanics set their aligners up to only read to the tenth of a degree to make the job go faster. That can round off some readings and mask a pull that should have been adjusted out.
Wednesday, April 26th, 2017 AT 3:42 PM