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I have a 81 zx 2x2 with 34 k miles. It has been in storage for 5 yeare and the car is new to me we just put it back on the road. All fluids were replaced the old gas was removed all filters were replaced and the enging was pre-oiled before startup. It has a rough spot anround 2000 rpm and, in all gears it feels like it is surging as you pass through 2000 to 2500 rpm under light load. If you get the car moving and shift above 2500 you don,t feel this surging. I seems a little better when the engine is hot. It is not the fuel regulator, dist cap, rotor plugs, wires, pcv valve or fuel filter. The thermal vacuun valves are no longer ing the loop, the dist. advance is connected directly to the manifold. I tried disconecting the vacuum lines that feed the heat,AC, and curse contrl to no effect. The airflow meter seems to be ok, it has been cleaned with contact cleaner. The engine has good compression 170# per on all 6. Timing is right on the money.Anybody got any Ideas

Thanks Erik
 
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