A plugged or partially plugged EGR valve could cause that.
timing could be off, or youre distribitor cap and rotor needs to be changed out, plugged fuel filter.
Replace the ignition coil.
Plugs, Wires, Cap, Rotor, the ignition coil, Air Filter, Fuel Filter
Run a compression test.
Plugs, wires, cap, rotor, air filter, pcv valve.
check spark plugs, plug leads, distributer cap and rotor button
if it has spark plugs check the distributor cap and/or rotor button for corrosion
8mm
It could very well be a stopped fuel filter. Follow the fuel line from the engine to the tank to find it. I have the same problem.. replaced fuel filter, replaced dizzy cap, rotor button, ignition leads.. (all 10 of them.).. turns out my problem was the mechanic put leads 1 - 2 backwards when he replaced the rotor button. Also, the screw in my rotor button would come loose, dont know if this is a common problem... but a bit of 'plumbers tape' solved it. :)
It is a triple rotor Rotary engine. A b2000 was there pickup.
nb,
try changing your oxygen sensor I have changed the oxygen sensor and it did not help. Do you have any other ideas? Could it be the carb?