Detroit 60 idle sputter

I had a similiar issue, it turned out to be the throttle position sensor which is basically your throttle pedal assembly. A very easy way to check it is have the truck off and unplug the wiring harness from the throttle pedal then plug it back in and start the truck and see if it runs right. Mine would do fine a few days after this way of resetting it then it would start again. The wiring harness coming to the throttle pedal is also a common problem.

 

I replaced the sensor but it didn't fix it so I had a shop repair the wiring harness going from the sensor to the ECM and that fixed it. Cost was $500. Mine was throwing a tps code

 

I have a 98 pete 379 with a 12.7 Detroit in it, been having this problem for months now. the problem is intermittent some days its great some days it acts up, right as you start rolling in the the throttle at lower speed and low rpm "1500 to 1600" it will start to pop and stumble and blow whiter grey smoke out the stacks it smells of raw fuel. does not do it at high way speeds. so far i have replaced the suction lines, filter head, new filter, new fuel pump, new map sensor, check check valve on return line and 0.80 restricted 90 on return. currently pulled all injectors out and re oringing them and putting new cups in, injectors have about 50,000 on them along with the entire motor, any help would be appreciated.

 

I have a 99 Pete with detroit and I'm having the same problem. I have replaced fuel lines, trs, srs, tps sensors. I found a harness running from the ecm that controls injectors and Jake's that was in bad shape I replaced. I'm still having the same problem did you ever figure it out?

 

Same problem. Hold throttle at 1500 in lower gears for a while, and make it sputter. Started after inframe. Check valve did mysteriously or coincidentally go bad while getting inframe. Replaced it. Recently replaced fuel lines. Had a couple leakers. Was sputtering real bad, and losing prime. Check valve is good. Fixed the 2 ends that were seeping fuel., ( so I thought). Ran great. I was still able to make it sputter once, but barely. Just started it after 40 hrs sitting, and took a while to start. So it’s still seeping fuel somewhere and maybe also sucking air. I’ll eventually figure it out, Maybe get different fuel lines, if I have to. Currently have original type braided with Eaton reusable fittings. Bottom line is it’s definitely caused by aerated fuel, since I’ve seen a noticeable improvement with the new lines. I may re do the ends, maybe put some brake fluid on the fitting before assembling them. Hopefully swell up the rubber hose and get a better seal. Might work,