Been having major hesitation right off idle to about 1700 rpm. Not so bad when dead cold, but bad when warm. 140K miles. New injectors, plugs, plug wires, cap & rotor, fuel& air filters. Ran several can of injector cleaner and combustion chamber cleaner. Very little improvement. The car idles fine and runs perfectly above 2000rpm. Great mileage and no smell of fuel. Could this be the dreaded (expensive) fuel distributor??