Can anyone help me we changed the vtec solenoid cleaned screen ran wires to ecu no check engines,tuned but one thing we did was swapped out the internals from my obd1gsr dizzy for my obd2 dizzy for my em1 but the car runs mint turbo boost up to 15psi motor runs awesome but right when we try to enable the vtec on the tune it's just breaks up real bad any idea? Can it be the dizzy?even tho it runs mint with no vtec? Or do you guys think it's that little o ring under the cam plate? Trying to see if I need to buy a dizzy before getting into the mechanical aspect of it please help!

 

Check your mechanical timing. I have seen this many times and it turned out that one of the cams was ONE tooth off.