I have a 99 honda accord that turns over but won't start.some dayz it starts with no problem and some dayz it doesn't.

If the Check Engine Light (CEL) comes on for 2 seconds and then goes out, when the ignition switch is turned to ON (Position II), then replace the Ignition Control Module and coil:

https://www.askmehelpdesk.com/cars-t...tml#post265896

If the CEL stays on, the ECM is likely failing.

Have a scan done to see if there are any codes stored in the computer.