Turbo problem

[top flight]

 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.

[timaz996]

Are all of your engine parameters good? Temp, engine and Trans, oil pressure? Did you check for codes?

[top flight]

all parameters are good.  Don't know how to check for codes.  Thanks for the reply

 

[timaz996]

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?

[top flight]

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.

[timaz996]

Not sure, That's all I have, someone else with more knowledge is going to have to chime in.

[top flight]

Thanks Tim

[Ivan K]

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.

[top flight]

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.

[MrAmbassador]

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?

[Bliksem]

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.

[top flight]

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.

[allphase8]

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

[top flight]

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.