Paulieflyer2 Posted August 12, 2023 Share Posted August 12, 2023 1999 E7 460 smokes at idle , it misses a little on Startup , other than that it runs good , I did an inframe overhaul about 30,000 miles ago replacing injectors but not the pumps , no fault codes , what's my best option, not taking it to what used to be Mack , it is now CIT Grayslake Illinois , buy a better scanner or start changing pumps Quote Link to comment https://www.bigmacktrucks.com/topic/73155-up-pumps/ Share on other sites More sharing options...
fjh Posted August 12, 2023 Share Posted August 12, 2023 Sounds like a stuck open injector or dynatard issue! You need to nail down which cyl by cracking injector lines then post what you find! Quote Link to comment https://www.bigmacktrucks.com/topic/73155-up-pumps/#findComment-536862 Share on other sites More sharing options...
Joey Mack Posted August 12, 2023 Share Posted August 12, 2023 You have an E-Tech.. Unplug the cam sensor and try to start it.. If it starts after a bit of cranking, plug it back in, and unplug the crank sensor in the flywheel housing and try to start it. It will start and run and either of them, but if it doesnt start with one unplugged, the one that IS plugged in needs to be inspected.. Quote Link to comment https://www.bigmacktrucks.com/topic/73155-up-pumps/#findComment-536864 Share on other sites More sharing options...
doubleclutchinweasel Posted August 15, 2023 Share Posted August 15, 2023 On 8/12/2023 at 7:30 PM, Joey Mack said: You have an E-Tech.. Unplug the cam sensor and try to start it.. If it starts after a bit of cranking, plug it back in, and unplug the crank sensor in the flywheel housing and try to start it. It will start and run and either of them, but if it doesnt start with one unplugged, the one that IS plugged in needs to be inspected.. That made my head hurt...🤪 1 Quote "Eagles may soar, but weasels don't get sucked into jet engines." Link to comment https://www.bigmacktrucks.com/topic/73155-up-pumps/#findComment-537014 Share on other sites More sharing options...
Joey Mack Posted August 15, 2023 Share Posted August 15, 2023 Take it from the top and go slow, DCW.. Quote Link to comment https://www.bigmacktrucks.com/topic/73155-up-pumps/#findComment-537022 Share on other sites More sharing options...
Popular Post Paulieflyer2 Posted August 20, 2023 Author Popular Post Share Posted August 20, 2023 I was able to borrow a better scanner , I did a cylinder delete test it turned out number 5 cylinder had an issue when cut out it immediately stopped smoking , I ruled out the UP pump and replaced the injector with a Mack reman , problem solved. Thank You all 2 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73155-up-pumps/#findComment-537460 Share on other sites More sharing options...
Joey Mack Posted August 20, 2023 Share Posted August 20, 2023 excellent.. thanks for posting the fix.. The injectors is more common to fail than the EUP's, so good on you for not loading the parts cannon.. Jojo I would say, FJH pointed you in the right direction.. Quote Link to comment https://www.bigmacktrucks.com/topic/73155-up-pumps/#findComment-537461 Share on other sites More sharing options...
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