Diesel pusher go over 50 mph?

[David0725]

I hope someone can help me here. I have a 1994 Holiday Rambler diesel pusher 8.3 at first and noticed it being a little sluggish and watching the boost gauge the temperature went up pretty fast but the boost was staying normal. We took it camping over the weekend. And everyting seemed ok. After we got and cleaned it out we want to bring back to storage. I couldnt get it over 50mph and the temp on the turbo was going up.could this be water in the fuel?

[mpierce]

RayChez wrote:
I would think that you have a bad air filter that needs changing out. Go with a Racor filter and you will have all kinds of power.

Plugged air filter will cause the engine to smoke very heavily. A LOT of black smoke. Plugged fuel filters will not.

[ILVMYGT]

If you are losing boost due to a leak in the Air Charged Cooler (ACC), associated tubing or hoses you need to get it fix ASAP. We had friends that had a cracked ACC (leaked) as it caused the turbo to over spin (no back pressure) and damaged it. So in addition to the ACC repair they had to replace the turbo.

[toolttime]

Check the rubber hoses on the booster. They do get pinholes in them quite often.

[RayChez]

I would think that you have a bad air filter that needs changing out. Go with a Racor filter and you will have all kinds of power.

[NeverHome2]

For the exhaust temp to go up there too much fuel and not enough air. Turbo is going bad not supplying air, hose to or from air charge cooler broken, or air filter very dirty and clogged. Check all this.

[Trackrig]

David0725 wrote:
Thank you everyone I will start with the no filter. But mentioned dragging brakes what exactly would that be?

That when you parked and set the brakes, they might not have fully released - that they may still be partially engaged and therefor called dragging.

I don't think this is your problem because if you got up to 50MPH and the brakes, or one of them, was dragging, you should have smelled it from getting too hot. But to be safe and rule out as many things as you can, the next time you drive for a ways, stop to feel each brake with your hand and sniff to see if you smell anything.

Bill

[kdk]

If you have one, make sure your pac brake is fully disengaged and open, just a thought kdk

[David0725]

Thank you everyone I will start with the no filter. But mentioned dragging brakes what exactly would that be?

[Ivylog]

A little sluggish and now 50 mph... change the fuel filters. Lack of fuel will show up as lack of boost which results in lack of power.

[DSDP_Don]

Your description of the problem is a little wide open and could be several things. At first glance, a turbo or turbo hose issue could be your problem as others have posted, but you always want to start with the simple things. Typically, the most common issue people see are dirty fuel filter(s) causing your problem. If you haven't replaced your filter(s) in the last year, I would start there. It's inexpensive and one of the first things a mechanic is going to check/change.

[mpierce]

mike brez wrote:

Old-Biscuit wrote:
No increase in boost pressure.........cracked/leaking hose air side of turbo to intake or faulty wastegate

X2 I would first check all hoses to and from turbo for tightness and or cracks. I had a loose hose on my pickup and had the same symptoms your having.

Could be leaking charge air cooler too. Need tech to see WHY it is not building boost, and get that fixed. Then, see if problem solved.

I would change fuel filters too. Cheap. Cause lots of low power problems. If not enough fuel, will not build boost either, as engine will not spin up enough to do so.

[mike_brez]

Old-Biscuit wrote:
No increase in boost pressure.........cracked/leaking hose air side of turbo to intake or faulty wastegate

X2 I would first check all hoses to and from turbo for tightness and or cracks. I had a loose hose on my pickup and had the same symptoms your having.

[rgatijnet1]

Dragging brakes

[hanko]

I had the same thing happen with an over the road tractor. What we finally found was the inside of the muffler had come apart and was clogging the exhaust.