Problem with Detroit series 60, 12. 7 DDEC1V Missing when starts

test looks good. what about fuel supply pressure? check valves?

 

Check your return for bubbles - in case you pinched a new o-ring , what cal codes did you use ? Were all the connections on the solenoids tight in the crimps and was a full overhead done

 

bad connection causes fault codes. Damaged o-rings - not, but sometimes fuel may leak inside engine and mix with oil

 

I always check terminals when I change injectors and nine times out of ten when one,s loose you won,t get a code but a stumble when cold

 

My 98 DD 12.7 does the same thing from day one. It starts up idles fine and all of a sudden there is a burp or a miss. Does this until she warms up. However sometimes she does it when she is warm. I took it to Detroit Diesel mechanic and they can't find any problems. There is no check engine light or anything. This has been going on for over 400,000 miles.

Hope you have better luck then we have. From what I understand from the mechanic it is an injector problem.

 

My cheap penny worth if it can help, I never in 40 years of electronics liked crimping terminal lugs to wire. The reason so many times these connections fail. Here's my process , Cut off all existing crimped terminal lugs,, cut a short sleeve of shrink tubing and slide it on to the wire,, now with a new terminal lug remove the plastic sleeve on the new terminal lug and ,, now solder tint your wire , slip the wire into to the terminal lug sleeve and crimp the lug sleeve, now solder the terminal lug sleeve and insure the terminal sleeve melds with the solder placed on the wire. Now you have a true mechnical and electrical connection, pull the shrink tubing on to the terminal lug and shrink the tubing. This long winded process will not fail you. thank you for reading my poor spelling. Have a good day.

 

Sid 51 Aux. Output #3 open circuit (high side) S3

Are you sure it is related with missfiring? Check for power supply!