Thanks, I'll check those too, since I guess then that what I am noticing is abnormal. My concern about injectors is also from the following:
On startup (warm or cold) the engine responds quickly, but uneven firing for a couple of seconds. The condition is least violent if I wait until I hear the pump stop, then I start it immediately. Engaging the starter before or later than that I get the roughness. My guess is no gas or gas leaking thru the injectors is at fault?