f350 2003 diesel 6 liter engiine problem?
 

My 2003 6 liter lopes --this has not been continuous till recently. I first noticed it when I would come up to a stop sign. After taking off it would clear up. But, now it is continuous. I put a code reader on and (even though no check engine light came on) it showed no errors. Any suggestions? thank you

thank you for your advice.