2006 HHR 2.2 5 speed about 96,000 she would run fine then shut off start back up wouldn't get out of its own way. Changed all injectors fixed that problem then a miss changed plugs fix that problem now has off idle stumble. once rpm's are up runs fine

Any ideas

TIA

 

Welcome to the forum, any codes that support your replacement of the injectors , what spark plugs did you install. Have you cleaned the throttle body and MAF sensor? Is the MAF sensor plugged in firmly?

 

This all happened in one day?

 

Probably not , I’m thinking TB and MAF cleaning.