pulling to the left

[mrsparas06]

My bus pulls to the left....only every once in a while but it does.  I didn't really notice before because I wasn't driving that far and I was being super careful.  What can cause this?  FYI I have none of the interior in and I was not sitting on a seat just my bum on the metal 

[vdubyah73]

Unequal tire pressure is the cheapest thing to check, so do that first.
 After a drive, immediately jump out and feel the wheels near the brake drums/calipers on the left side, take the hub caps off before the drive so you can get your hand right on the wheel. If one wheel is warmer/friggen hotter than any other, that brake is sticking. Probably a swollen brake hose.
 Front end out of alignment.

[GostaBerling]

Is it just a random thing? Does it happen when you hit the brakes? Does it happen when you hit a bump? Does it happen when the wind is blowing hard? Pay close attentions to the circumstances around which it happens. This will help you to narrow the problem down further.

[mrsparas06]

Sweet guys!  Thanks for the info.  I will check the tire pressure here this weekend...I kind of ran to far close to empty and don't have the extra $$ to get gas right this second.  I will also do the jump out and feel the temps of the wheels.  That, vdubyah, was what I was thinking...at least about brakes sticking only because it was to the left.  The problem though is that its not while hitting the brakes or wind but just randomly while I am accelerating or coasting.  The last time I was driving it pulled REALLY hard to the left and I had to work at keeping the wheels straight....I will figure it out here and let y'all know!  Thanks guys!!

[mrsparas06]

Ok husband gave me gas $$ so I could check this out.  Turns out...as far as I can tell...it was the tire pressure    I always freak thinking its the worse.  I am still going to keep an eye on it just to make sure but since I put the right amount of air in I didn't have any issues driving home  Thanks again guys!