1. You have Da Vinci 1.0 with repetitor-firmware, and you are switching from stock hotend to E3D, correct? Before you swith to E3D, your Da Vinci 1.0 works well with repetitor-firmware, correct?

2. You switch to E3D, you are using heater, themostats, and the fan come with E3D, correct?

The problem is Da Vinci 1.0 supply 12V for heater, 5V for fans, and it use different themostats than E3D. So multiple problem can happen.
1. fan not spin fast enough, but that will not cause your problem, you will only have jamming problem printing PLA.

2. If your E3D come with 24V heater, then the Da Vinci 1.0 will not supply enough power for heater, it will take long time to heat up, very long time.

3. Your E3D come with different themostates, so it will display wrong temperature if not setup correctly. if after hotend cool down, your machine did not give you room temperature reading, you need to change your themostate setting in repetitior-firmware.

So, to have your problem solved, find out more detail about the E3D you purchased. Contact the seller and get more detailed information, is the heater 12V or 24V, what is the model number for the themostates.(If you can not find detailed information on these two, swap the stock heater and themostate with E3D, there is no major problem with stock heater and themostate, and you can keep it this way).

found the specs i have a blue heater and it's right on spec of 6 ohms my problem is i can't get the temp up on the extruder i already tried to change all the temp setting's no joy the extruder temp cools down as it prints

What temp are you trying to reach. The  firmware has a hard limit that needs to be changed if you have not changed it.

da vinci 1.0 fan are 5V, and use 12V heater. So I would not speculate it make your 12V fan run super fast. It is more likely you got 24V heater version of E3D.

Dennis