[ranedrops]

I just took the car through inspection and the gas cap passed there - would that rule it out as the problem?

Could damaged vent lines also cause the car to buck and hesitate?

It hesitates when you first hit the gas, then as you drive it will buck, sometimes quiet hard. It feels at times that it is not taking up the gas (but has not stalled out). If you let go of the gas it immediately stops or if you floor it it will pick up the gas. This happens sporadically, sometimes worse on some days than others.

Also, do I need to take this to a shop to have them run tests on the vent and the vacuum lines - could this be the problem?

Thanks