[Bob]

Bill,

Every one of us long time owners has had issues that were checked and rechecked and mechanics swore everything was OK. Only after persistence were issues resolved often by finding a problem that everyone insisted was OK..

Your problems may be related to DDEC, but I cannot get past your description which sounds like you are losing boost. If you have a new engine I am going to assume it is clean and sooting is going to be easily seen. Look closely at the exhaust manifold, look for evidence of the gasket leaking, double check the clamps at the turbo inlet pipes or a crack in one of the inlet pipes. That is a cheap, easy inspection especially if you have a mirror with an extension because the back of the exhaust manifold towards the transmission is a common area for cracks or gasket failure.

Another simple test is just for grins poke your finger into the turbo after removing the pipe and spin it. There should be no binding, dragging or noise.

Cynic that I am the other two things that come to mind that are not associated with a bad ECM but can affect the power you can produce would be the turbo boost sensor or the throttle position sensor. Usually those rob you of almost all power.

[Bob]

so we pulled out of Atlanta metro area this morning at 7:30 under tornado warnings. Made it to Florida by 12:30 and pulled into a campground in Jasper (off 75, just south of I10).

We are now hanging out with tornado warnings and 60 mile wind gusts.

Thinking heading south isn’t the answer right now.

[Bob]

Jon,

You didn’t mention the tailights…. you losing your eyesight??

Larry

[Bob]

Robert,

The added tank adds more weight which adversely impacts MPG so if you want to compensate for the lost of mileage when towing you can control the mileage by reducing weight as much as possible, and keeping your foot off the accelerator. We all know just 5 or 10 MPH less makes a big difference in MPG.

My 8V92 averaged 5.6 MPG at about 1800 to 1900 RPM which in that coach was around 61 to 62 MPH. If I got up around 65 to 68 I lost almost 1/2 MPG. It wasn’t a big deal then because fuel was as low as $.63 and never hit $20 per gallon. Today if you want to go fast the question is how much do you want to spend?

[Bob]

Dean,

I just had to do another restring here at Port Charlotte. You have to remove the shade to get to the limit switch. Liberty may have a trick to do it in place, but I sure haven’t found a way. I place it on a table near the rear of the bus and use the 24v from the jump lug for power. You have to measure the blind open and closed and then get to that measurement by adusting.

There may be an easier way, but I haven’t found it.

[Bob]

Robert,

You say kicked off, do you mean when you come back you have to login again more often then before?

[Bob]

Jerry did you ever figure out air leaks yet

[Bob]

I installed a Bose speaker system this winter for the tv and the sat radio it is all blue tooth no wires it sounds great wires and wiring are out dated blue tooth is the way to go it works with iPhone iPod or tv the best.. Put Bose in bathroom and bedroom it will blow the windows out all blue tooth

[Bob]

I have learned so much since finding this Prevost site.

We are still thinking of having a new one built and everything I have learned here made me realize that they are ALL very different even though they start off with the same shell (Marathon, Millennium and Liberty Coach).

OTR Air vs. Roof Air, Valid Slides vs. Prevost Slides, Aqua-Hot vs. Webasto, one holding tank vs. two separate tanks, AGM batteries vs. Lithium Ion, etc….. the list is pretty long on the differences and choices.

BTW Jon, my User Name and Password are ‘obviously’ working again. I had to clear my Apple and the password that I wrote down for this site was about 9 miles long and I missed one letter as it was a lower case letter which looked like a number.

Again, thanks for all the help.

Mark

[Bob]

Obviously you need to get the bus to generate air. Nothing else counts until that is resolved. governor, pressurre relief, dryer all bear scrutiny)

Once you are building air and the engine driven compressor is filling all systems (primary, secondary and auxiliary) then you can move to the other issues. When you say you have no electric to the Norgren solenoids can we assume you mean the solenoid stack in the sterer compartment? Do you have the key on? Is it one solenoid that is not getting power, or all of them regardless of how the level low controls are placed?

May we also assume you have an unmodified level low as installed by Prevost or has the system been modified such as having an HWH?

As to the relays, I have found Prevost is the best source, but relays are relays are relays so you can likely get a replacement at place like WW Grainger or any electrical supply house. Depending on the type you might even find one at Radio Shack, but they are de-emphasizing that part of their business.

[Bob]

Robert,

I will try and respond to your questions bearing in mind that I have not done a comprehensive study and/or comparison of the Gast and CAT compressors. But assuming the Gast is a Model Series 5HC, on the surface I conclude the following:

Space: It appears the CAT has a smaller foot print than the Gast therefore it could occupy the present designated space without interference.

Acoustics: The Gast is rated at 75 decibels and the CAT at 60. A difference of 15 decibels could be impressive inside the coach since the measurement of sound is a logrimthic function.

Performance: The free air flow (CFM) rating for the Gast is 3.6 @ 40psi and 2.6 @ 90psi whereas the CAT is 40 @ 40 psi amd 30 at 90 psi. The maximum pressure is not stated for the Gast but believed to be 125psi as is the CAT.

When I installed the soundproofing I did include the chamber cover plate. I had a rather large leak in the aux. air system and chased it down to a cracked copper tube on the compressor (fatigue failure). It was at this time that upgrades to the chamber were made. It is important to maintain tha size of the air route to the compressor so that it does not starve for air. On mine, the passage way is in the upper right corner which receives air from across two Cruiseair units from the front.

I can’t argue with the Jun-Air advocates because these compressors have a stellar track record. But the price of these units??? Oh man !!!!!!

Hope these views help.

[Bob]

another good job Al

[Bob]

Thanks Roger!

No one believes the age of this coach. Guess someone took very good care of it along the way. 😉

Sure love that we can go anywhere and still be at home.

[Bob]

I may be wrong but I think your life would be a whole lot easier if you folks moved south,–oh say 1500 hundred miles or so. It sure would be a lot warmer ! Yup you folks should come to florida with us older but smarter folks. Hell you can even bring your pet cows . We got tons of them here.

[Bob]

I spent a few hours at an airport or two and that is a great place to base a coach. Under the right circumstances you can park in a hangar which makles it even nicer because the coach is protected.

With 50 amp power water and access to sewer it doesn’t get much better.

I suspect we have members who store their coaches in hangars.