Surging is normally a lean issue. It is caused by momentarily having enough fuel, then not having enough fuel. Could be water in the system, plugged filter, restricted supply line, bad pump, or bad tps.
Have you pulled the plugs to see how they're burning ?Check for any vacuum lines off or leaking. Did this start out of the blue, or after any modifications ? Might also have a load test done on the battery. A low amperage issue could be starving the pump and electrical system of necessary power.
Last edited by rodsatheart; 04-07-2019 at 04:51 AM.