I am having a problem getting the d21pickup to idle well and to operate
smoothly on acceleration into 5 gear..I have 150K miles on vehicle and it
runs wonderfully at highway speeds. However, on idle it continues to be
rough..On aggressive acceleration through gears it coughs andspits and
doenst accelerate as it should. I have done the usual tuneups..new wires,
check timing etc.. I have begun to suspect the oxygen sensor.. Is that
probable ? Not sure of the history of the vehicle except for last 20K
miles