Help 2005 no power and dies

[SSwords]

Ok my dad has a 2005 auto with no power while pulling. He has had a cp3 replaced and the ecu. Still has the same problem. Injectors have all been checked fuel pump has been pres. and flow tested and the fuel has been tested for water. When pulling it will start out say 40mph at the bottom of the hill and will be on the floor at 5 at the top we had to stop and low lock it to make it up one hill. We are in northern missouri the hills are steep but we have never had this problem before. While unloaded it has a little surge at 70. I am out of options. Help

 

[hsmith]

Is it making any boost? Any codes? Must be smoking like a train.

 

[SSwords]

It is smoking not as bad as a crazy larry progam or a puller truck. No codes and this truck is bone stock no gauges so I don't know about the boost

 

[JimB1]

That's a pretty good plug of repair $$$$ for it to still not work proper.



Throttle position sensor (APPS, accelerator pedal position sensor) is strong posibility.



Use TDR SEARCH with those keywords for much more info.

 

[sag2]

There are just too many possibilities without knowing some basic things. You already have $4000+ in parts with no change so it's probably time to go for a ride with a DRBIII and see what is going on with the fuel system. Also don't rule out a trans problem if it is an auto, but you probably would have burned it up by now. Get a fuel pressure gauge and see what the lift pump is doing pulling the hill.

Also who "checked" the injectors. There are very few Bosch facilities that can test the injectors.

 

[RShipp]

I agree with sag2, very few injector shops have the ability to test 26,000 psi injectors.

Other than that, It sounds like the engine is in a derate mode. You didn't say if it was throwing a check engine light or not. Also, I have seen where the check engine light bulb has burned out and you wouldn't even know. Also, take all the aftermarket electronics off of it. Put the bully dog back to stock (completely remove the download) and unplug the Van Aken. Too many time I have seen aftermarket parts go bad and the dealership have no idea. They don't consider those things. It's either a yes or no question with their diagnostics.

 

[RShipp]

Wait a min. Your signature isn't the truck in question. Sorry, a few too many beverages for the night I guess. It would really help if you told us of any mods that your Dad's truck has.

 

[SSwords]

Well the dealer did all the test on the truck and replacement of parts they are a good dealer and are fair on their services. This truck is bone stock execpt the air bags in the rear. No codes no check eng light I told him that he needs to take the truck and trailer to the dealer and let them put the computer and guages on it to find the problem while it is happening. I am on the other side of the state right now and won't be back for a few days just trying to give him a few ideas.

 

[Wingate]

Isn't there a PRV(pressure regulating valve) or check valve on the HPCR that can go bad and cause rail pressure to fall/vary?... .

 

[SSwords]

Ok the dealer is even stumped runs like normal unloaded but with a empty trailer no more than 5000 lbs it runs like a 1992 that we used to have put somthing on the trailer and it runs even worse than that like the non turbo. Dealer says that their are no codes at all and the trans is shifting normal. The only thing that I noticed on his truck compared to mine is that when you shut it off it stops and does not do the shake that most do. My 2003 auto did it and my 2006 G56 does it but his 2005 auto does not you turn the key off and thats it no shake or shimmy just like a gaser.

 

[TCDiesel]

Does it have dead Pedal or just No Power?

 

[Diesel Thunder]

When you say you had to "low lock it to make it up one hill" does that mean that you couldn't keep the RPMs up? Or were the RPMs up but weren't being transfered to the ground. If trans is shifting normally without the trailer and the dealer says the trans is shifting normally even with the trailer--I would look at the torque converter. Can the dealer even check the torque converter with the scanner? Sounds like the torque converter is slipping under heavy load. Check the color and smell of the transmission fluid, I suspect it could be getting real hot (ie burnt smell and very dark).

It may be helpful to post some RPM observations during the problems ( ie speed and associated RPM).

Anyways, those are my thoughts, best of luck.

 

[SSwords]

Yep the RPMs just keep falling and it will go down to all most idle and then shift down same thing over and over until their are no more gears then it has killed it before. Now I finaly got a little more info from dad yesterday when I had to go get his tractor from the dealer. He said that this all happend after the last computer reprogram from the dealer I have no idea what one it was but it was supose to help the serching for gears and the accruacy of the overhead console fuel milage. Is what the dealer told him. (he is not good with rembering what the dealer says the programs does unless it is somthing that he had problems with)

 

[RMcKenna]

It sounds to me you have a boost problem. Maybe the wast gate is sticking or your just not building boost. You or the dealer need to check the boost under a load.

 

[SSwords]

Well I would think a boost prob to but it does not smoke now it just pulls the motor down with a very light smoke. I used to be a Ford Tech and the power choke would loose a intercooler hose and it would smoke like a pulling truck. But I agree that the boost need to be checked. The dealer was short handed and sent a couple of non diesel techs out to drive it and when I started to ask questions they had no clue but that the trany was fine and it had no power. They never thought to look at the boost, rail pres, waste gate none of the important stuff. The diesel tech is going to be thier today to look at it. This is all warenty after I got to talking to dad about takeing this somewhere else so I would let them put all the parts on that they want. I am just tring to get ideas of what it would be.

 

[RShipp]

Low boost will throw a code anyway. There is a manifold air pressure sensor.

 

[AH64ID]

It sounds like the throttle position sensor. . is it still an APPS in 05? Isn't working. which means full throttle may only be 15% throttle. A simple scan tool should be able to tell you the TPS range. .

Does the problem exist in cruise control as well?

 

[rbattelle]

Does it act completely normal when you're unloaded?

If so, I don't see it as an APPS issue. Lack of smoke makes me think it's not a boost issue.

Seems like transmission might be a good place to look.

What sort of fuel mileage has he been getting? The answer only counts if it's something he tracks regularly.

Ryan

 

[SSwords]

We finaly found it. the new cp3 pump was only makeing 6000 to 8000 psi at 1500 wide open throtle so they put on another new one and seem to be running fine we just got it sat afternoon and we pulled my truck home it mantained 70 just like it always used to. We will see if this one makes it.

 

[RShipp]

Good to hear. I'm suprised the dealer didn't test the new pump. Oh well, just goes to show that new parts may also be flawed.