mechmagcn Posted June 2, 2021 Share Posted June 2, 2021 Hey all, long time since I've been around here. A friend called with problems. 01 E7 460 after idling will pop through the exhaust when taking off from a stop. Sputters and occasionally backfires. This happens through 4th or 5th gear and then clears up. It won't do it again until it idles for some time, usually while getting loaded. Another friend, a rather good mechanic has pulled his hair out trying to figure this one out. My thoughts were low fuel pressure or sucking air, but he has pretty much ruled those out. Fuel lines have been changed, timing sensors checked, fuel pump changed, injectors tested bad and replaced, engine wiring harness had some wear so replaced, he even bought one E-up and swapped holes to see if that was it. I'm sure there's a few other things that he's tried that I'm forgetting. I'm a retired truck and heavy equipment mechanic that used to work on this truck, but seldom turn wrenches anymore. Just trying to get some insight into this problem. I never was one to throw parts at a problem and hope something would stick. I'm afraid the mechanic working on it has given up and that's what is happening now. I hope someone has seen this and can help a broke down old mechanic out. Thanks all. 1 Quote 1971 Mack R600 Toterhome "Superdawg" living the life of leisure pulling 1999 NuWa Snowbird 34+2 SE102 "Dawghouse" Link to comment Share on other sites More sharing options...
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