hi i have a 97 c280 that starts surging when giving it gas,to much and it will backfire,hdnt got no ck engine light,replaced a few vaccum lines and cleaned th mass air sensor with no luck,it has 80k on a rebuilt engine,no indications of a head gasket problem,the only other thing i saw was a 40amp big fuse blown that is on the passenger side box where the ecm is,does any 1 knows what that powers,help please thnx,also it tends to do this once it warmed up or drving for about 20mins
update fuse went to sec air injection,it now works,has any 1 have any suggestions???????