2005 Saturn ION misfire and it sputters
2005 Saturn ION manual 197k miles
It starts and runs in idle ..does not overheat
I can drive it in neighborhood but I can not go on road ..
i.e. can not go pass 35 mph..
I believe after 20 mph it sputters when accelerator is pressed
recently changed spark plugs and coil pack but no change
Where do you think problem is ?