I was in the process of switching out bulbs to LED from Lasfit canbus turns signal bulbs.. and thought maybe I need to replace the relay so that way I delete hyperflash from left or right turn signal. It only slows down when I press 4-way Hazard switch..any thought??
Hyperflash is not a glitch. It is purposely done by the vehicle to indicate to the driver that one (or both) of the turn signals has burned out. They measure the current, and when it drops below expected, they believe a bulb has burned out and increase the flashing speed to indicate this.
If an LED replacement bulb doesn't have suitable load resistors to draw a sufficient current, the car thinks the bulbs, which it expects to be halogen bulbs drawing much more current, are burned out.
The reason that the 4-way hazard blinks normal is because it's not programmed to flash faster to indicate a burned-out bulb.
The fix is either to stick with halogen bulbs as designed, or use LED bulbs with a suitably sized load resistor so they draw the current a normal halogen bulb would.