Loss of power - turbo problem?

[rogerwwebb]

On the second day of a trip from Iowa to North Carolina before Christmas and
during very freezing temperatures our coach began losing power during
acceleration from lower gears and while climbing hills in top gear.

The lose of power is severe and I can feel the drop off and see on the turbo
boost gage drop 3-5 psi as it engine tries to produce more power. It appears
the turbo boost 'catches' and tries to build again, but it drops off the 3-5 psi
and continues this cycle.

I did not get any lights/codes, so I'm unsure what it is. On the flat where
turbo boost is not `in demand' it cruises along fine.

Any ideas, experiences or suggestions where to look first would be appreciated

Roger Webb
91WLWB
Cedar Rapids, IA

[G Boyd]

Two things i would look at.

First change your fuel filters and put some conditioner in your fuel. Where is the Racor guage sitting?

Second take a  look at your hoses that run from the turbo back to the cold air intake. If you have a leak in one of those hoses it will cut your boost under demand.


That is a starting point that will cost you nothing.

Happy New Year

On 30 December 2010 08:43, rogerwwebb <"rogerwwebb@aol.com"> wrote:

 

On the second day of a trip from Iowa to North Carolina before Christmas and during very freezing temperatures our coach began losing power during acceleration from lower gears and while climbing hills in top gear.



The lose of power is severe and I can feel the drop off and see on the turbo boost gage drop 3-5 psi as it engine tries to produce more power. It appears the turbo boost 'catches' and tries to build again, but it drops off the 3-5 psi and continues this cycle.



I did not get any lights/codes, so I'm unsure what it is. On the flat where turbo boost is not `in demand' it cruises along fine.



Any ideas, experiences or suggestions where to look first would be appreciated



Roger Webb

91WLWB

Cedar Rapids, IA

[Robert Johannesen]

Roger, check both fuel filters and the air filter. That is always my first response before doing any "loss of power" checks.

Bob Johannesen

---

From: rogerwwebb
To: WanderlodgeForum@yahoogroups.com
Sent: Thu, December 30, 2010 10:43:59 AM
Subject: [WanderlodgeForum] Loss of power - turbo problem?

On the second day of a trip from Iowa to North Carolina before Christmas and during very freezing temperatures our coach began losing power during acceleration from lower gears and while climbing hills in top gear.

The lose of power is severe and I can feel the drop off and see on the turbo boost gage drop 3-5 psi as it engine tries to produce more power. It appears the turbo boost 'catches' and tries to build again, but it drops off the 3-5 psi and continues this cycle.

I did not get any lights/codes, so I'm unsure what it is. On the flat where turbo boost is not `in demand' it cruises along fine.

Any ideas, experiences or suggestions where to look first would be appreciated

Roger Webb
91WLWB
Cedar Rapids, IA

[Michael Bulriss]

After Bob's suggestions, then check for a cracked exhaust pipe to the turbo. Check around the pipe flanges where they are held by those Mormon clamps. Your symptoms sound like what I had with an exhaust leak in one of those pipes.

Mike Bulriss

1991WB40 "Texas Minivan"

South Padre

Sent from my iPhone

On Dec 30, 2010, at 11:13 AM, Robert Johannesen <"packratfxr@yahoo.com"> wrote:

Roger, check both fuel filters and the air filter. That is always my first response before doing any "loss of power" checks.

Bob Johannesen

---

From: rogerwwebb <"rogerwwebb@aol.com">
To: "WanderlodgeForum@yahoogroups.com"
Sent: Thu, December 30, 2010 10:43:59 AM
Subject: [WanderlodgeForum] Loss of power - turbo problem?

On the second day of a trip from Iowa to North Carolina before Christmas and during very freezing temperatures our coach began losing power during acceleration from lower gears and while climbing hills in top gear.

The lose of power is severe and I can feel the drop off and see on the turbo boost gage drop 3-5 psi as it engine tries to produce more power. It appears the turbo boost 'catches' and tries to build again, but it drops off the 3-5 psi and continues this cycle.

I did not get any lights/codes, so I'm unsure what it is. On the flat where turbo boost is not `in demand' it cruises along fine.

Any ideas, experiences or suggestions where to look first would be appreciated

Roger Webb
91WLWB
Cedar Rapids, IA

[GARY MINKER]

Marmon Clamps You would have seen a significant loss of turbo boost if this were the case.filters are the typical cause. You would also have soot in the engine compartment. gary 85pt40 --- On Thu, 12/30/10, Michael Bulriss <mbulriss@...> wrote: From: Michael Bulriss <mbulriss@...> Subject: Re: [WanderlodgeForum] Loss of power - turbo problem? To: "WanderlodgeForum@yahoogroups.com" Date: Thursday, December 30, 2010, 1:48 PM After Bob's suggestions, then check for a cracked exhaust pipe to the turbo. Check around the pipe flanges where they are held by those Mormon clamps. Your symptoms sound like what I had with an exhaust leak in one of those pipes. Mike Bulriss 1991WB40 "Texas Minivan" South Padre Sent from my iPhone On Dec 30, 2010, at 11:13 AM, Robert Johannesen <packratfxr@...> wrote: Roger, check both fuel filters and the air filter. That is always my first response before doing any "loss of power" checks. Bob Johannesen From: rogerwwebb <rogerwwebb@...> To: [/url][url=/mc/compose?to=WanderlodgeForum@yahoogroups.com]WanderlodgeForum@yahoogroups.com Sent: Thu, December 30, 2010 10:43:59 AM Subject: [WanderlodgeForum] Loss of power - turbo problem? On the second day of a trip from Iowa to North Carolina before Christmas and during very freezing temperatures our coach began losing power during acceleration from lower gears and while climbing hills in top gear. The lose of power is severe and I can feel the drop off and see on the turbo boost gage drop 3-5 psi as it engine tries to produce more power. It appears the turbo boost 'catches' and tries to build again, but it drops off the 3-5 psi and continues this cycle. I did not get any lights/codes, so I'm unsure what it is. On the flat where turbo boost is not `in demand' it cruises along fine. Any ideas, experiences or suggestions where to look first would be appreciated Roger Webb 91WLWB Cedar Rapids, IA