Check engine light remains on and has hard starting... alomost a chugging effect

There are several things that could cause this, the quickest way to find the problem is using a code reader. Under your dashboard, normally on the left side, there is a standardized connector made to plug a diagnostic reader into; it may have a plastic cover over it but the connector has a number of round pins recessed. The code reader is plugged into this and the device reads the static memory that records error messages generated by the computer using inputs from numerous sensors on your car. These are displayed on a small LCD and need to be noted so one can decode the numbers from a manual or installed software on a standard computer.
The code readers range in price from ~$30 to nearly $200 US and are available from any auto parts store or many stores on line.
If you have no urge to own one, any service shop will have them  and charge you a couple of bucks to retrieve your codes and translate them.