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09-30-2016, 02:23 PM
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#1
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Senior Member
Join Date: Jul 2011
Location: Naples, Florida & Cape Cod, Ma,
Posts: 547
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Power loss on climbing steep grades
On a trip to the Rockies, turbo boost did not pass 15 psi, Loosing some power, ISL 400, no issues on straight roads at any speed or passing, any ideas as what would cause this issue? 2005 HR SCEPTER.
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09-30-2016, 02:36 PM
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#2
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Registered User
Join Date: Mar 2010
Posts: 8,777
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Quote:
Originally Posted by Rjburian
On a trip to the Rockies, turbo boost did not pass 15 psi, Loosing some power, ISL 400, no issues on straight roads at any speed or passing, any ideas as what would cause this issue? 2005 HR SCEPTER.
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Rjburian
An air leak at one of the intake pipe hose clamps, (or in the pipes or hoses themselves), can result in low boost pressure.
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09-30-2016, 03:13 PM
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#3
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Senior Member
Join Date: May 2004
Location: cayucos, ca
Posts: 1,299
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Also your charge air cooler can be cracked causing loss of turbo pressure.
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
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09-30-2016, 03:27 PM
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#4
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Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
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Besides what has been suggested, the very first thing I would try is to change out your fuel filters.
That is usually the main reason for loss of power plus it happens so suddenly and has happened to me once.
Dr4Film ----- Richard
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09-30-2016, 03:35 PM
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#5
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Senior Member
Monaco Owners Club
Join Date: Sep 2003
Location: Quitman MS
Posts: 2,967
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If not fuel filters it's Probably a leaky CAC, pull the grill off start the coach set it on high idle and spray with a soap soulition especially where the tubes go into the end caps. Be sure to Rinse off all soap when through. If it is a bad CAC you can have it recorded lots cheaper than a new and Richard could furnish you with the name of a company in AL that does good work also if you are a do it your self it is not that hard of a job I posted the instructions a few yrs back on how to remove the CAC without removing the radiator on our Dyn and it should not be that much difference on your coach.
__________________
Walt & Will
2000 Dynasty
2017 Ram Big Horn Crew C 4X4 w/ M&G
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09-30-2016, 06:21 PM
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#6
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Senior Member
Monaco Owners Club
Join Date: May 2012
Location: DFW, Tex-US
Posts: 6,196
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I bet fuel filters too...
(that's what mine was on I-40 !)
__________________
'11 Monaco Diplomat 43DFT RR10R pushed by a '14 Jeep Wrangler JKU. History.. 5'ers: 13 Redwood 38gk(junk!), 11 MVP Destiny, Open Range TT, Winn LeSharo, C's, popups, vans, tents...
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09-30-2016, 07:07 PM
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#7
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Senior Member
Join Date: May 2004
Location: cayucos, ca
Posts: 1,299
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Second thought I think Dr4film is right. Fuel filters (2) first.
__________________
Ross Starkenburg
2017 Newmar Dutch Star 4369. Spartan chassis w/full disc brakes. 2015 Jeep Grand Cherokee toad
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09-30-2016, 07:23 PM
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#8
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Senior Member
Freightliner Owners Club
Join Date: Aug 2008
Location: Florida Keys
Posts: 2,687
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I had some trouble last year with power after getting a few tankfuls of B20. Put some Diesel Kleen in to get me home and changed the fuel filters. Runs fine now but I still add the DK when I get a few tanks of B20.
__________________
Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
'17 Winnebago View 24V, '02 R-Vision B+
RVing for 20 years & 200,000+ miles
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09-30-2016, 10:51 PM
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#9
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Senior Member
Join Date: Feb 2012
Posts: 539
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My ISL 400 would surge on a hard pull would not pull full boost pressure but would run fine on flat ground. Turned out to be the air intake hose from the air compressor to the intake split
__________________
Bob & Elaine McClelland and the spoiled pup Izzie
2008 Monaco Diplomat
Desert Hills & Parker Az
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