09 EX Spectra engine surge
I have an 09 Spectra EX. No problems till two weeks ago. When I cold start, the engine will surge from 1300 to about 2000 rpm repeatedly for about 1 minute. After it warms, the surge stops and all is normal.
Also occasionally when I stop for a light, it will sometimes give a quick surge and want to bolt one or two times then settle down. (It puts teeth marks on my heart)
I didn't check for codes as the engine light did not come on. Can a code be generated if the light is not on? Can it be one of the sensors?
Thanks, Smitty