ok I cant figure out what the heck or why the heck its doing this....It shifts perfect 1st, 2nd then when I hit third its just like "KA-POOP" and just can't get up like it wants too....I changed the spark plugs and the wiring harness...did the fuel injector cleaner ...any other sugestions?..the weird part is it only does it once in a while but it still really weird that it does it...I know its not the way im driving cuz I've had other people drive it and it did it.