R.E.D Posted January 12 Share Posted January 12 So I'm posting this for my buddy. He has a slight engine Miss that's been driving him crazy. 98 E-Tech 460. Engine Miss comes and goes. In the past month he has replaced all eups, injectors, and both timing sensors. He also ran the overhead. Idle fuel pressure is around 50 to 60 PSI. Goes up to 70 Max revs. He's going to do the fuel pressure test under load. Is there a clear fitting that can be put in line in the fuel lines to determine fuel aeration? I know they have some for some Cummins engines, just wondering if anyone has the part number. No blink codes active, he did have some before but they were for the eups which have been replaced. Thank you for your help guys Red Quote Link to comment Share on other sites More sharing options...
JoeH Posted January 12 Share Posted January 12 Someone on here said they replaced their engine wiring harness and it made a big difference in engine performance. Said it should be added to the tune up list Quote Link to comment Share on other sites More sharing options...
R.E.D Posted January 12 Author Share Posted January 12 I'm guessing at some point he's going to have to do that. Forgot to mention he also replaced the boost sensor. Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 12 Share Posted January 12 Is the miss at low idle only, or throughout the engine speeds while driving? Quote Link to comment Share on other sites More sharing options...
R.E.D Posted January 12 Author Share Posted January 12 He says it's felt 1100 rpm and under the most Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 12 Share Posted January 12 I would check fuel pressure.. should be around 80 PSI for that year Quote Link to comment Share on other sites More sharing options...
R.E.D Posted January 13 Author Share Posted January 13 Do you happen to have the part number of the fitting with the clear window in it? In order to see if there's any air in the fuel? Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 13 Share Posted January 13 If you get a clear jug, like a juice jug for example. you can attach a 1/4'' line to the small nipple on the fuel pressure regulator, and put the hose in the bottom of the jug, and keep it submerged, and run the engine, and look for air bubbles. have someone there to shut it off before you over fill the jug. 2 Quote Link to comment Share on other sites More sharing options...
Joey Mack Posted January 14 Share Posted January 14 I forgot to mention slipping a hose over the plastic line and putting it in the jug too.. sorry bud.. Have you done any more to it since your last posting? Quote Link to comment Share on other sites More sharing options...
R.E.D Posted January 14 Author Share Posted January 14 It's my buddy's truck ..I haven't spoken to him since last post.ill keep y'all informed Quote Link to comment Share on other sites More sharing options...
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