1999 Detroit series 60 12.7 sid 5 fmi 1

new wiring harness, checked injectors, it started as Sid 3 fmi 1 now its Sid 5 fmi 1 which is both for injector response time to long just got done with a full overhaul truck runs great until you are really putting it on her then the code comes up if you let it idle down for a minute or cost down a hill it will go away plz any ideas.

 

61_Flash_Code_61_Injector_Response_Long

 

Speed sensor in trans tail shaft. mine thru all kinds of codes,

 

Sid 5 is cylinder #2

 

Fmi 5 may be a short to ground on #2 injector. The i denotes a short. You obviously know much more than I do, but that’s how I read it, from the manual. Fmi 3 is # 3 cylinder.

 

yeah guys I've had it open about ten time pulled the ecm/ecu off the block checked all terminals the code has been all over the place but always the same response time to long but its been Sid 2, Sid 3, Sid 4 and Sid 5 most consistently Sid 3 then i changed the outer harness for intake manifold, crank shaft sensor, etc..

 

I know you said you checked the alternator ground. The manual also suggests disconnecting the alternator, to see if the codes go away.

 

the code only comes underload

 

What year is the ECM?

Had a few go to poop on our gliders and they would cause all kinds of chaos... randomly.. at 3am.