Maxidyne Posted August 5, 2020 Share Posted August 5, 2020 Sounds like the "delete" deleted the wrong code, demand your money back. 1100-1200 RPM is below the power band for an '08 Volvo engine, not surprising it has little power there. Quote Link to comment https://www.bigmacktrucks.com/topic/55363-mp8-egr-def-delete/page/2/#findComment-457721 Share on other sites More sharing options...
Mackpro Posted August 5, 2020 Share Posted August 5, 2020 15 hours ago, shane73 said: I have a 08 mp8 475 hp deleted new motor turbo fuel pump injectors I have 50grand into this and I'm starting to get frustrated.i have no power 25 lbs boost falls on its face from 1100 to 1200 rpm no check engine lights im thinking its the ecm. my question is can I put a older ecm in that did not have emissions? I’ve seen lots of bad deletes on Macks , seems very few work out great. The last one was where a delete was done and a export model data file was installed in the engine ECM. This sounds like a great idea but the export models don’t have a VGT turbo, they have a standard turbo. The truck would barely build boost because the VGT turbo was not being command to move abs build . I had to remove the turbo actuator and manually move the arm on the turbo and test drive , if I went to far it would over boost and backfire through the air filter and derate. Once I got it figured out I built a wedge spacer and put it inside the turbo actuator to hold the arm in place . This was years ago and don’t remember the actual position of the arm . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55363-mp8-egr-def-delete/page/2/#findComment-457733 Share on other sites More sharing options...
Mack Technician Posted August 5, 2020 Share Posted August 5, 2020 (edited) 3 hours ago, Mackpro said: I’ve seen lots of bad deletes on Macks , seems very few work out great. The last one was where a delete was done and a export model data file was installed in the engine ECM. This sounds like a great idea but the export models don’t have a VGT turbo, they have a standard turbo. The truck would barely build boost because the VGT turbo was not being command to move abs build . I had to remove the turbo actuator and manually move the arm on the turbo and test drive , if I went to far it would over boost and backfire through the air filter and derate. Once I got it figured out I built a wedge spacer and put it inside the turbo actuator to hold the arm in place . This was years ago and don’t remember the actual position of the arm . Love it! Be tempted to machine a little adjuster screw to set VGT travel limitation and a “give’r hell” cable, with a hand grab T-bar, for the big hill climb mode! Pull for full boost and slam it back home when the EGT’s hit 1,400 degrees. Edited August 5, 2020 by Mack Technician 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55363-mp8-egr-def-delete/page/2/#findComment-457755 Share on other sites More sharing options...
Mackpro Posted August 6, 2020 Share Posted August 6, 2020 It was a learning process for sure. I was thinking I could adjust the arm to where I wanted it and put the actuator back on and all would good, but the pressure inside the turbo would overpower the actuator and let the arm move. Also the actuator gear has no internal stop in either direction , so the gear will move in either direction somewhat freely. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55363-mp8-egr-def-delete/page/2/#findComment-457772 Share on other sites More sharing options...
mp8_macky Posted September 21, 2020 Share Posted September 21, 2020 (edited) First step to address to when having low power issues is checking intake for leaks Also when it comes to deletes i've been using https://truckecmtunes.com for 5 years already, i've never had a single issue Keep in mind that there are a lot of bad deletes floating around Edited November 26, 2020 by mp8_macky Quote Link to comment https://www.bigmacktrucks.com/topic/55363-mp8-egr-def-delete/page/2/#findComment-461099 Share on other sites More sharing options...
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