Mack Gazza Posted January 24, 2020 Share Posted January 24, 2020 Looking for some ideas on a problem l have with a EA7 470 CCRS Motor in my 2004 Mack Qantum . All of a sudden fully loaded doing 95 kms/hr started missing and losing power, so stopped to check out for obvious problems around the truck and nothing seemingly wrong, turned engine off and restarted and ran fine on idle but as soon as power was applied back to missing again. Have had the truck in being sorted but cannot find a problem, have cracked injectors while running and all run rough once cracked so cannot identify a particular cylinder, power source to ECU is ok, cam angle sensor been checked and ECU connections gone over. Has any of you guys out there had this in this engine before or have experienced this in the workshop? Looking forward to any hints or answers to get back on the road again GAZZA. Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/ Share on other sites More sharing options...
Mack Technician Posted January 24, 2020 Share Posted January 24, 2020 You check fuel pressure? Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-441219 Share on other sites More sharing options...
Mack Gazza Posted January 24, 2020 Author Share Posted January 24, 2020 Thanks Mack Tech, cant say as is in shop but most certainly will ask if been checked. Cheers Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-441220 Share on other sites More sharing options...
Mack Technician Posted January 24, 2020 Share Posted January 24, 2020 I’m sure they have those basics covered... good 🍀 luck! Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-441224 Share on other sites More sharing options...
Jamkar Posted January 24, 2020 Share Posted January 24, 2020 Good chance it’s the gear on the transfer pump turning on the shaft, replace pump, don’t bother trying to repair it. 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-441250 Share on other sites More sharing options...
Jamkar Posted January 24, 2020 Share Posted January 24, 2020 When my pump failed like that, it still supplied enough fuel for idle/low power but that was all. PS, love my Qantum. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-441252 Share on other sites More sharing options...
Mack Gazza Posted January 25, 2020 Author Share Posted January 25, 2020 Awesome Jamcar, have spoken to mechanic and he agrees with that scenario and will be on it first thing Tuesday. Thanks heaps Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-441276 Share on other sites More sharing options...
Jamkar Posted January 29, 2020 Share Posted January 29, 2020 Any results yet Gazza? Let us know what the problem was mate, maybe it’ll help future victims. Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-441512 Share on other sites More sharing options...
Mack Gazza Posted June 3, 2021 Author Share Posted June 3, 2021 Was the gear on the fuel pump spinning thanks Jamkar and ended up a relatively inexpensive fix. Thanks for the great advice. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-474677 Share on other sites More sharing options...
fjh Posted June 4, 2021 Share Posted June 4, 2021 On 6/3/2021 at 3:45 AM, Mack Gazza said: Was the gear on the fuel pump spinning thanks Jamkar and ended up a relatively inexpensive fix. Thanks for the great advice. Good on you thanks for posting the fix! Quote Link to comment https://www.bigmacktrucks.com/topic/60686-problem-with-ea7-470-ccrs-motor-in-2004-mack-qantum/#findComment-474720 Share on other sites More sharing options...
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