thomastractorsvc Posted April 3, 2020 Share Posted April 3, 2020 check your motor mounts and front damper, lot of hours and years on them rubber parts Quote Robert"I reject your reality and substitute my own." Link to comment https://www.bigmacktrucks.com/topic/57605-return-fuel-problem-misfire/page/2/#findComment-447603 Share on other sites More sharing options...
Ahubbard Posted April 3, 2020 Author Share Posted April 3, 2020 Both good ideas. I just put new motor mounts in and the dampener is back ordered at Mack. See if I can get one ... maybe. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/57605-return-fuel-problem-misfire/page/2/#findComment-447604 Share on other sites More sharing options...
steeler Posted April 8, 2020 Share Posted April 8, 2020 On 1/10/2020 at 10:49 AM, fjh said: This resonant ride condition was a bit of an issue on the v8 with the ambac pump as well! The fix was a light spring om the right side rack acted as a damper for this condition ! I have never run into it on any Vmac Pumps entirly possible thou! Yup, I never saw it on a Vmac pump either, just the mechanical. Fortunately I haven't messed with many E9's..the ones I did, seemed to be a pain to work on but that could just be my lack of time with them. Quote Link to comment https://www.bigmacktrucks.com/topic/57605-return-fuel-problem-misfire/page/2/#findComment-448025 Share on other sites More sharing options...
Ahubbard Posted April 30, 2020 Author Share Posted April 30, 2020 Ever since the new injection pump I get a real loud ticking through the return line can be heard in the tank. I am wondering if it is that overflow valve on the pump? I don’t remember ever hearing this before. I am trying to attach a video but don’t know how Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/57605-return-fuel-problem-misfire/page/2/#findComment-450086 Share on other sites More sharing options...
Ahubbard Posted April 30, 2020 Author Share Posted April 30, 2020 Maybe this will work. Sent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/57605-return-fuel-problem-misfire/page/2/#findComment-450087 Share on other sites More sharing options...
Ahubbard Posted May 1, 2020 Author Share Posted May 1, 2020 Is this normal and I just never heard it before? I’m the past year I have:New tankNew fuel linesReman injection pumpReman injectors New return lines. Reman cylinder heads Only thing not changed in the fuel system is injector lines and fuel filter heads. I think I am just hearing the lift pump or the overflow noise reverberating through the line. But this is a first for me. It’s pretty pronounced. Made me think the reman pump has a defective lift pump or overflow. Don’t want to spend the money to replace either just to find out it’s normalSent from my iPhone using Tapatalk Quote Link to comment https://www.bigmacktrucks.com/topic/57605-return-fuel-problem-misfire/page/2/#findComment-450169 Share on other sites More sharing options...
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