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Topic: Check engine light after replacing turbo boots on piping to CAC (Read 444 times) previous topic - next topic

Check engine light after replacing turbo boots on piping to CAC

I had a mechanic change the silicone boots on the piping line from the turbo to the CAC and back as a PM measure and now I'm getting a check engine light with the message "turbo wstgate 2/ high volts". All we did was change the 4 boots and adjust the valves. The CAC pipe needed to be removed to adjust the valves so I figured it was a good time to replace the 20 year old boots. Anyone have an idea on what this check engine light is and what I need to check to clear the code. I have a silverleaf glass dash that shows me the engine diagnostics. The code will clear but comes back. Any help is appreciated

Also does anyone know what these green devices in the second picture are for?

Thanks
Keith
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #1 –
I would go into Cummins Quickserve , need to have your engine serial number entered,  then there is a section for error code.  It will pull up a page that goes into detail of error,  things to check and solutions.
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #2 –
I tried putting in the  SPN 88 and FMI 3 and  Quickserve came up with "No Cummins fault codes match the SPN and FMI codes provided."  Of course I have a different engine then in your coach.
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #3 –
I would suggest a super detailed look at all the wiring around the engine and look for any freshly disconnected connectors (clean on the ends) or wires that might have been pulled out off a connector.  Obviously look at any wires around the turbo and where they lead and around the valve cover where the mechanic was.

Years ago I was doing something on my engine and my foot was resting on a bundle of wires and I inadvertently disconnected a connector that was in the bundle.  I spent a good month scratching my head and researching the issue before I found the disconnected wires.  Plugged them back together and everything was good again.  Easiest fix I have ever had!
The disconnected wires were right in front of me but it took me quite a while to see it; that why I say a "super detailed look".

Those green devices appear to be resistors.  What they are doing there is a harder question.  From their size it looks they can handle 50 watts of power dissipation each.  I would be surprised if they were supplied by Cummins with the engine.  If Foretravel added them you should be to find them in the schematic wiring for the engine.  If they were added by a previous owner you would need to follow the wires to see where they go. 
Do you know of any added on feature to the engine?  (maybe a pre-lube pump?)
I also see a wire nut in the photo; definitely not Cummins and highly unlike to be Foretravel too.
It looks like there is silicone over the connections too.  That's usually not a good idea since some silicones cure with a vinegar smelling compound that is corrosive to wiring.  Looking more and more like PO did it, IMO.
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #4 –
Where does the heavy wire go that comes out of the green things. That might help to figure out
what they are for.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #5 –
Quote from: oldguy –
Where does the heavy wire go that comes out of the green things. That might help to figure out
what they are for.
The heavy wire goes to ground
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #6 –
That stumps me.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #7 –
Ive seen them used in LED turn signals to draw enough power for the flasher to work with LEDs

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #8 –
Seems strange to locate LED light resistors on the engine; I would put them on the frame some where close the the lights or trailer plug.

I'm wondering if these are being used to bias the output of one of the engine sensors to give the engine more fuel at certain times.

For instance the engine CPU limits fuel when the intake manifold pressure is low to minimize black smoke (unburnt fuel).  This happens when you take off from a stop and the turbo has yet to build up pressure in the intake manifold.  If the intake manifold is biased to show more pressure than there is, the CPU will send more fuel to the engine than it normally would and your acceleration will improve (along with more black smoke out the tailpipe).  I think these are called "boost foolers" but I don't know that much about them and I am purely speculating!!

The device on your coach might be something completely different.  You really just need to trace the wires and figure out where they are going.
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho
 

Re: Check engine light after replacing turbo boots on piping to CAC

Reply #9 –
Yesterday went back over and started the motor to check the check engine light. It was still coming on and every time I push the clear button it would come back after about 10 times of doing this. It stayed off and didn't come back in. Took the coach out for a drive today just to make sure everything was right as we were fixing to go on a trip and a 20 mile drive yielded no check engine light, so whatever caused it fixed itself and it doesn't appear to be back. I've got my fingers crossed.....



Keith
The selected media item is not currently available.Keith & Jo
2003 U320T 4025 PBBS Designer series
Build 6203    Cummins 500hp
2000 U320 4010 WTFE / Build 5762 —Sold—
Motorcade #18070   
Pasadena, Texas
2015 Jeep Wrangler Sahara-Sunset Orange pearl coat
Don't argue with a fool, people watching might not be able to tell the difference.