PONTIAC GRAND AM ENGINE LOW POWER

My Car Won't Go Over 40 Mph, It Acts Like Something Is Pulling It Back. I Can Push The Pedal To The Floor, And It Won't Go Past 40...

2002 Pontiac Grand Am, 3400 V6. Aside From Basic Maintenance And A Blown Head Gasket 60,000 Miles Ago The Car Has Been Great. In The Past 6...