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03-21-2012, 12:33 AM
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#1
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Member
Monaco Owners Club
Join Date: May 2011
Location: Missouri
Posts: 56
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ISL 400 Boost
My Dash boost indicator is stuck around 750 engine running, around 600 with engine off. I do not have a boost reading on my Aladdin engine performance screen, so I have no idea what the boost actually is. I'm seeing some loss of power, but until I can determine if there's boost and what it is, I won't know whether to have the turbo checked.. Can anyone tell me how to test the indicator, and tell me where the sending unit is located and how to test it?
I read an old post on how to test the boost while driving. Anyone here ever done that, and got any suggestions? I'll try that if I get the gauge working.
My aladdin manual shows both percent load and boost pressure on their screen image, but my monitor only reflects percent load. I'd be interested to know if there's an upgrade to software, etc to include boost pressure on the Aladdin.
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Roger, Jenny and Sasha
2004 Monaco Windsor pst
2010 Nissan Frontier crew
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03-21-2012, 07:20 AM
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#2
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Golden, Colorado
Posts: 837
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My boost gauge did almost the same thing. It was very slow and would stay above zero for a while after the engine was shut off. On the engine where the boost gauge gets its pressure reading from is a fitting on the intake manifold with an air line attached. I pulled the air line out and removed the fitting and found it completely plugged with carbon. I soaked it in solvent and dug around inside with a dentist pick. There was a screen in my fitting so be careful. Finally got it clean and put it back together, now it works perfect.
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2004 Monaco Signature with a Detroit 60, Vorad Radar, Samsung Fridge, Induction cook top, 2020 GMC Denali
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03-23-2012, 12:49 AM
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#3
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Member
Monaco Owners Club
Join Date: May 2011
Location: Missouri
Posts: 56
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Thanks. When it stops raining, I'll dig into it. I attempted to reply last night, but did something wrong and it didn't take. I think I hit the Post reply button outside your posting. I have no idea where it went. Anyway, I wanted to be sure and say thanks. I'll post my results one way or the other. I'm going to an auto parts store tomorrow to get solvent. I don't know what I need yet, but I would guess it's similar to what someone would use to clean an egr valve.
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Roger, Jenny and Sasha
2004 Monaco Windsor pst
2010 Nissan Frontier crew
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03-23-2012, 06:57 AM
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#4
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Golden, Colorado
Posts: 837
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I used solvent from a parts washer but I think any will do. Mine had to soak for a couple of hours to soften up the carbon. You can test the gauge buy putting air pressure to the air line with someone watching the gauge, it should jump up. DON'T USE TO MUCH AS IT CAN BREAK IT....just a quick shot.
Hope this helps
Dave
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2004 Monaco Signature with a Detroit 60, Vorad Radar, Samsung Fridge, Induction cook top, 2020 GMC Denali
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03-23-2012, 07:02 AM
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#5
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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Roger, if your boost was really zero then your MH's performance would be a real dog. Those diesels just don't have any power without a turbo. There would be no doubt in your mind that there is a problem.
I second what Dave Hinds says about the boost gauge hookup to the intake manifold. Both Dave's and mine have a small plastic hose attached to the manifold that runs the length of the MH and goes directly to the gauge. Mine had no reading when I bought my MH. Took the small brass fitting off the manifold and found it had what is called a surge suppresser in the fitting and in was carnoned up. I could not clean mine so I drilled it out making three small holes about .5mm each in diameter. Now I show great boost.
Lets take about your Aladdin Engine page. There are two versions of the Aladdin system. I call one as Lite and the other as Full. You cannot update from a Lite to a Full version because Aladdin is not made or supported anymore. There is another system that can be added on made by a Canadian Company called SilverLeaf and it works well. Lets go back to YOUR Aladdin system. On the Full Aladdin system you can read BOOST on the Main Engine Page and you can select the Main Engine Page with the joystick then move the joystick to the right again to get into what is called a sub-screen that will show all kinds of data. You just keep pushing the joystick to the right and it will keep changing sb-screens. These sub-screens will rotate through continously. If you want to freeze on a sub-screen then once you see what you want you push the joystick forward and it will hold on that screen. If you have the full version Aladdin you will find two sub-screen that shows Turbo Boost Pressure.
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Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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03-23-2012, 05:05 PM
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#6
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Senior Member
Monaco Owners Club
Join Date: Sep 2003
Location: Quitman MS
Posts: 2,967
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Here is a link to the VMSpc by Silverleaf
VMSpc | SilverLeaf Electronics, Inc.
You can down load the program to your computer free.
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Walt & Will
2000 Dynasty
2017 Ram Big Horn Crew C 4X4 w/ M&G
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03-23-2012, 05:12 PM
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#7
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Senior Member
Join Date: Aug 2011
Posts: 119
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are you talking boost or exhaust temperature ?
never seen a boost gauge that reads 650 so I am assuming your talking about exhaust gas temp.
if so all you need is a new egt temp probe .
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2005 chevy silverado 2500hd 6.0L
2011 palomino sabre 32 bhok-6
Ron and Amy Benhart
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03-24-2012, 06:18 AM
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#8
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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f1100turbo, that is a good point on the dial numbers. I missed that, those numbers would match for an EGT gauge but should not be stuck at 600 when you turn it off.
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Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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03-24-2012, 04:04 PM
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#9
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Member
Monaco Owners Club
Join Date: May 2011
Location: Missouri
Posts: 56
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Mike, I scrolled over to the second page of my aladdin and found the boost pressure. I started the engine and at idle it reads .1 boost pressure. The dash indicator is stuck on about 6 1/2 psi. racing engine did not affect pressure on either indicator. I climbed around the engine and looked from above thru the closed access door and so far the only thing I found with a small plastic tube going to it is on the curb side going into the head, which I think might be the oil pressure sensor. I unscrewed it to look at it but could not get it to come all the way out without forcing, so I put it back in where it belonged.
As for power, I drove 250 miles pulling a toad about 5,000 pounds and did not notice any poor power until O got in the hills around Branson, where It did seem to perform a little poorer than it has on other trips going through the same hills, but not what I would expect from complete turbo failure. I had an F350 PSD that I have experienced the variable vanes sticking a number of times, and complete turbo failure twice. The performance degradation I perceived during this trip was fairly subtile.
I'm going back to look for the sensor again. I'm assuming the hose going to it is very small in diameter, maybe that's why I'm missing it.
Thanks to all of you for your feedback. I'll keep you posted.
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Roger, Jenny and Sasha
2004 Monaco Windsor pst
2010 Nissan Frontier crew
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03-24-2012, 04:30 PM
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#10
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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Roger it has been my experience that you cannot generate boost on a Turbo or a belt driven supercharger by just revving it up without a load on it. I would drive it and see what boost the Aladdin engine page shows especially during hard acceleration from a standstill.
The boost sensor would have to be hooked to the intake manifold and some Cummins motors have an intake manifold that is integral to the head. I do have a question about the gauge you are looking at. Does it say Boost on it or EGT or something else on the gauge face?
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Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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03-25-2012, 04:39 PM
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#11
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Member
Monaco Owners Club
Join Date: May 2011
Location: Missouri
Posts: 56
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Mike,
The boost gauge on the dash says Boost at the bottom, and PSI near the top. On the Aladdin, it says BOOST PRESS.
My Cummins engine manual says the intake manifold is integral to the head. I spent all afternoon today looking for the fitting and air line. I did find a yellow plastic line (1/4 in) going into the engine just below the intake manifold and removed it and it was clean. No screen or anything else to catch debri, just about 1/16 to 3/32 hole through it. It actually looked like it was threaded into the block itself. I'm not sure about my next step. If that line was the boost line, it was definitely clean coming out of the motor.
__________________
Roger, Jenny and Sasha
2004 Monaco Windsor pst
2010 Nissan Frontier crew
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03-25-2012, 04:55 PM
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#12
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Senior Member
Join Date: Apr 2008
Location: Freeport, ME
Posts: 4,707
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Roger, the big thing is if you get boost on the Aladdin then I would guess maybe that dash gauge is bad. You should have a inspection panel on top of the dash that you can open then get to the back of the boost gauge. See what color that hose is going into the gauge and see if it is the same. You can then remove the hose from the gauge and start the motor and see if you get and air through it. You should feel something. If not leave the hose hanging out and drive it and see if you feel air pressure then. If you do and you show boost on the Aladdin then I would suspect a bad gauge.
The biggest cause of bad performance when climbing hills is partially blocked fuel filters. If it has been over 10K miles since you have changed them then I would recommend doing that before you get too worried about the motor. If anything bad is wrong with that motor you should get a Check Engine Light or a Stop Engine Light.
__________________
Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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03-25-2012, 08:31 PM
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#13
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Member
Monaco Owners Club
Join Date: May 2011
Location: Missouri
Posts: 56
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Mike, just got back from church. Right after I sent the last posting I got under the dash panel you mentioned, and yes, it is yellow! It's a maze in there, and the gauge is at the bottom. I tried to figure out how to release the gauge fitting without damaging anything but haven't figured that out how yet. When I saw the line was yellow, I started the engine and got .1 psi on the Aladdin, but when I depressed the pedal hard and quickly, the pressure jumped up to about 3.5 momentarily, so I'm going to try your suggestion as soon as I get the line removed from the gauge.
Thanks.
I changed oil, filter and both fuel filters last summer, about 2,000 miles ago.
__________________
Roger, Jenny and Sasha
2004 Monaco Windsor pst
2010 Nissan Frontier crew
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03-26-2012, 06:19 AM
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#14
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Senior Member
Monaco Owners Club
Join Date: Sep 2010
Location: Golden, Colorado
Posts: 837
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Roger, I used air pressure hose to blow into the hose at the engine. That way I knew the gauge worked, have someone watch gauge it see if it works. Don't use to much pressure, just a quick shot. There is not much to go wrong inside a gauge. My problem was the fitting at the engine, it was clogged where it screwed into the engine.
Good luck
Dave
__________________
2004 Monaco Signature with a Detroit 60, Vorad Radar, Samsung Fridge, Induction cook top, 2020 GMC Denali
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