I have a surging prob in the vortex.

Its very slight but noticeable as you cruise.

All the leads ,plugs, fuel and air filters are new the timing is set right,all connectors are clean and siliconed,and theres no fault codes showing.

I only run 95 ron or 98.

Any ideas why :?:

I would check your oxygen sensor and knock sensor first.

Clean the throttle body and all its passages, the IAC and all the engine wiring harness connectors. If nothing improves think about having the injectors professionally cleaned. Visit http://www.xt6.net for more ideas.

I have but one thing to say,"Fuel Pump." It is sad but true. Most of the time if it starts to surge while cruising, the fuel pump is on it's way to the retirement home. Try changing it out. Mine stopped surging once I replaced it. Just beware of the "gasoline bath" that comes with the territory.