Working on the girlfriends sunfire again. Recently it's started to have issues accelerating from a stop. When you hit the gas, it's like a 1-count then all the power comes at once. (In one case, enough of the power came at once to break traction, hah.)

Anyway, there is no CEL codes, however using the Android app Torque, it shows two things of interest:
1-2 shift error: 0.38 seconds
2-3 shift error: 6.3 seconds.
Not sure if it somehow relates to the problem. I don't feel any hesitation shifting between gears, only when accelerating from a stop.

It also shows that cylinder 4 misfired once during a fifteen minute drive. A single misfire certainly wouldn't cause that kind of hesitation.


2002 Sunfire, 2.2L Ecotec, Automatic.