top flight Posted July 25, 2021 Share Posted July 25, 2021 Engine Cummins 325hp diesel in 2007 HR Vacationer. Had new Turbo installed in Georgia. Complete new exhaust system (including electronics) installed 1500 miles earlier. Left to return to Canada. Warning light lit and shortly afterwards turbo cut out. Stopped for a while and turbo ran normally for 30-40 minutes. happens all the time now, sometimes perfect and other times nothing. Has anyone else experienced this and solved the problem. Link to comment Share on other sites More sharing options...
timaz996 Posted July 25, 2021 Share Posted July 25, 2021 Are all of your engine parameters good? Temp, engine and Trans, oil pressure? Did you check for codes? Link to comment Share on other sites More sharing options...
top flight Posted July 25, 2021 Author Share Posted July 25, 2021 all parameters are good. Don't know how to check for codes. Thanks for the reply Link to comment Share on other sites More sharing options...
timaz996 Posted July 25, 2021 Share Posted July 25, 2021 I don't know how to check for codes on your coach. Can you look down from your closet and make sure the Pac-brake is not engaged? or did it have good power up until this happened? Link to comment Share on other sites More sharing options...
top flight Posted July 25, 2021 Author Share Posted July 25, 2021 Thanks, it has good power under normal aspiration. Better when turbo kicks in. The engine brake works as it should. I am wondering if this might be some kind of wiring problem. Link to comment Share on other sites More sharing options...
timaz996 Posted July 25, 2021 Share Posted July 25, 2021 Not sure, That's all I have, someone else with more knowledge is going to have to chime in. Link to comment Share on other sites More sharing options...
top flight Posted July 25, 2021 Author Share Posted July 25, 2021 Thanks Tim Link to comment Share on other sites More sharing options...
Ivan K Posted July 25, 2021 Share Posted July 25, 2021 Does the boost cut out while driving or does it just not come up from no boost situation like idling or coasting? I would also think that there should be a code for it. I suspect that you have an electronic turbo controller, given the year, and you could check around the wiring to it for start. Link to comment Share on other sites More sharing options...
top flight Posted July 25, 2021 Author Share Posted July 25, 2021 Sometimes it cuts out (or in) when driving, most times it happens from startup. Good idea on the turbo controller wiring. I will check it. Thanks for replying. Link to comment Share on other sites More sharing options...
MrAmbassador Posted July 25, 2021 Share Posted July 25, 2021 I thought my turbo was not working properly. I would step on the fuel and the Coach just sat. It turned out to be the secondary fuel filter. Have you changed out your filters lately? Link to comment Share on other sites More sharing options...
Bliksem Posted July 25, 2021 Share Posted July 25, 2021 You have variable turbo which is electronically controlled, the fact that is was just recently replaced and that power is good when it is working makes me think is is electrical. I would suspect a wiring issue or the controller on the turbo is faulty or was not calibrated correctly. Link to comment Share on other sites More sharing options...
top flight Posted July 26, 2021 Author Share Posted July 26, 2021 Both the above make sense. The shop that installed the turbo had problems calibrating it. I will get that checked ASAP. I will also try to trace the wiring and check that out. I'll post the solution once I have it. Thanks to all who replied. Link to comment Share on other sites More sharing options...
allphase8 Posted July 26, 2021 Share Posted July 26, 2021 There is control module that tells the turbo to come on or up. I had an issue where when I started engine if there was hardly any boost the turbo would not come on. Cycling the from engine off to start after several attempts cleared the issue and ran fine until shut down, then may or may not occur when starting again. Never happened while driving if I had boost when starting engine. Cummins replaced the module and no problems since, this was several years ago. Ron 2006 Camelot 400 ISL Link to comment Share on other sites More sharing options...
top flight Posted July 26, 2021 Author Share Posted July 26, 2021 Thanks Ron, I will definitely try this and report back. Coach in storage right now so may not be able to try it until next weekend. Link to comment Share on other sites More sharing options...
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