Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
2009 chevy HHR 2.2 ecotec. I removed the injectors to manually clean them. I was not aware that they are supposed to go back in the same place they were taken from. Is this necessary for this car? Car runs fine and no misfires.