theoldreliable Posted August 12, 2011 Share Posted August 12, 2011 I have a 96 CH613 E7 350hp. Recently it has started bucking and stuttering when under load. The fuel filters have been replaced within the last month. The fuel pump(V-Mac) was rebuilt about 200,000 miles ago. When running empty it does not appear to have this problem. Any advice would be appreciated. Quote Link to comment https://www.bigmacktrucks.com/topic/20159-ch613-stalls-and-stutters-under-load/ Share on other sites More sharing options...
cgallamore Posted August 12, 2011 Share Posted August 12, 2011 had a 1996 ch613 350,doing that, chased it for 3 months, wound up being a piece of grit in the throttle servo.if you use a air hose to blow out the floor, thats how i got it. after the second time, i vaced it Quote http://www.bigmacktrucks.com/uploads/1272400769/gallery_4852_794_314995.jpg Link to comment https://www.bigmacktrucks.com/topic/20159-ch613-stalls-and-stutters-under-load/#findComment-83589 Share on other sites More sharing options...
theoldreliable Posted August 24, 2011 Author Share Posted August 24, 2011 Checked the throttle servo and it appears to be ok. Checked the wiring harness that goes to the pump and could find no breaks in any of the wires, but when it acts up its like you turned the key off and turned it right back on. Doesn't do this all the time and only after the truck has been running for a while. Quote Link to comment https://www.bigmacktrucks.com/topic/20159-ch613-stalls-and-stutters-under-load/#findComment-84294 Share on other sites More sharing options...
Rob Posted August 24, 2011 Share Posted August 24, 2011 Checked the throttle servo and it appears to be ok. Checked the wiring harness that goes to the pump and could find no breaks in any of the wires, but when it acts up its like you turned the key off and turned it right back on. Doesn't do this all the time and only after the truck has been running for a while.As good measure it probably wouldn't hurt to throw a new cranshaft position sensor into the engine if it uses one. These "hall effect" devices can become intermittent with time, exposure, heat, etc.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/20159-ch613-stalls-and-stutters-under-load/#findComment-84298 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.