Good Sam Club Open Roads Forum: V10 4R100 lost power on a mountain
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 > V10 4R100 lost power on a mountain

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hdbroker

here

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Posted: 08/20/20 08:09pm Link  |  Quote  |  Print  |  Notify Moderator

So I am cruising up the Blue Ridge Mountains pulling my 33 ft TT doing 65 mph, Suddenly the engine bogs down and I have no power. It felt like the torque converter locked in 1 to 1. The transmission would not down shift. I let off the accelerator and then tried to accelerate again and still no power. It has happened three times, twice on hills and once on flat.

I have lost a coil pack before and when that happens the engine runs really rough. It didn't feel like that. It feels like the engine just doesn't enough power and the transmission should be down shifting but is in overdrive. When towing I am in tow haul mode overdrive off.

I pulled over to the side of the road and eventually I put it back in Drive and pulled out and everything was normal.

This vehicle is in great shape but I do not know the history of the power-train. I am considering dropping a new crate engine and transmission in it just for piece of mind. I bought it with 160,000 because it was so clean and in such great shape. I only use the vehicle for towing the TT, it is not my daily driver.

Any thoughts or opinions? Thanks for any help.

ppine

Northern Nevada

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Posted: 08/20/20 10:37pm Link  |  Quote  |  Print  |  Notify Moderator

Check the codes and have someone smart look at it before you go out and spend a lot of money. Your trans may be getting towards the end of its life.

carringb

Corvallis, OR

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Posted: 08/20/20 10:49pm Link  |  Quote  |  Print  |  Notify Moderator

What year? Based on your symptoms, you must have a 2005 or newer?

Sounds suspiciously like a faulty electronic throttle body / MAF assembly.

You most certainly should get it properly diagnosed. A new engine and transmission wont' fix this problem if its the throttle body assembly. And will easily cost many thousands, vs a couple hundred for a new TB.

Are you sure you have a 4R100? Because that trans doesn't have Tow/Haul mode.


Bryan

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carringb

Corvallis, OR

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Posted: 08/20/20 11:26pm Link  |  Quote  |  Print  |  Notify Moderator

If it is a 4R100, the TPS is the likely culprit, as it does control shift points and fuel map compensation.

pianotuna

Regina, SK, Canada

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Posted: 08/20/20 11:54pm Link  |  Quote  |  Print  |  Notify Moderator

At 160,000 miles the engine is not even 1/3 the way through its service life.


Regards, Don
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dodge guy

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Posted: 08/21/20 05:59am Link  |  Quote  |  Print  |  Notify Moderator

I'm going with a fuel pump failing. Your losing fuel pressure. When that happens you can get the symptoms you describe!


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zigzagrv

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Posted: 08/21/20 06:51am Link  |  Quote  |  Print  |  Notify Moderator

Sounds like the engine control put it into 'limp' mode because of a major problem like the MAF sensor. Simple things first: check the air filter. Had a similar problem on my '03 motorhome. When it goes into limp mode, it will not let you accelerate hard and feels like the trans is going bad when you do. My problem was a water saturated air filter.


Ron

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Groover

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Posted: 08/21/20 07:18am Link  |  Quote  |  Print  |  Notify Moderator

dodge guy wrote:

I'm going with a fuel pump failing. Your losing fuel pressure. When that happens you can get the symptoms you describe!


That or trash blocking the fuel intake. When you shut down the trash may float away, restoring flow and power. But, it will be back!

parker.rowe

Delaware

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Posted: 08/21/20 07:21am Link  |  Quote  |  Print  |  Notify Moderator

It could be a lot of things, unfortunately.

Any check engine lights? I would hook up a scan tool and see if you have any stored codes.

It could be that the transmission got too hot as well. Most of the time that will force a more aggressive converter lockup, and depending on the truck could reduce power.
That might explain why waiting a bit on the side of the road made it go back to normal.

Without a scan tool you will really just be guessing (like we are) and throwing parts at it. Engine and Trans may be fine.


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Thunderbolt

North Branch, Mn USA

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Posted: 08/21/20 07:31am Link  |  Quote  |  Print  |  Notify Moderator

My 03 Chevy did the same thing and it turned out to be the Throttle Position Sensor.


Bryan
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