6.5 Turbo no boost

[Pstyckiewicz]

Ok I got back at it today. Took my driver side flexible exhaust pipe off going to turbo. I then took the intake pipe off. I stuck a shop vac on the exhaust side and blew air in the turbo. I used my bore scope and confirmed the turbine was spinning. I couldn’t get my hand in there to feel the play.
In addition I found that there is oil coming from the cdr valve and going into the turbo/ intake. Any idea if it is supposed to do that? It’s a newer cdr valve. There is little to no blow by when taking to oil cap off. (If that matters).
Used some exhaust gasket maker stuff and slapped it back together. Still not showing boost!?

 

[Mogman]

The CDR relieves the pressure built up in the crank case so yes there would be some oil/oil vapor passed through the valve.
There may not be any blow-by at idle but you can be assured there is some under load.
As long as it is not using/burning oil it is a non issue.
Curious where did you tap off for the boost gauge?

 

[TNDRIVER]

Ok I got back at it today. Took my driver side flexible exhaust pipe off going to turbo. I then took the intake pipe off. I stuck a shop vac on the exhaust side and blew air in the turbo. I used my bore scope and confirmed the turbine was spinning. I couldn’t get my hand in there to feel the play.
In addition I found that there is oil coming from the cdr valve and going into the turbo/ intake. Any idea if it is supposed to do that? It’s a newer cdr valve. There is little to no blow by when taking to oil cap off. (If that matters).
Used some exhaust gasket maker stuff and slapped it back together. Still not showing boost!?

If the turbo is spinning freely my next stop would be to inspect and clean the catalytic converter. And yea, where did you tap into the manifold at? At least two inquiring minds would like to know......

 

[Pstyckiewicz]

I tapped into it here.

 

[Pstyckiewicz]

Is there any straight pipes sold out there to eliminate the catalytic converter? Or any easy way that people have removed them?

 

[Mogman]

I think many just remove the cat and test drive without it.
Generally speaking a by-pass pipe is illegal.

 

[TOBASH]

Is there any straight pipes sold out there to eliminate the catalytic converter? Or any easy way that people have removed them?

It is not a catalytic converter. It is a soot trap.

Look up CDR cleaning on YouTube.

 

[TOBASH]

FYI

Read my Project Joshua thread. A dirty [EDIT-DPF] is a clear culprit with loss of power. Clean it and things really change

 

[Pstyckiewicz]

Next will be to clean the cat out. And clean cdr valve.

 

[TOBASH]

Next will be to clean the cat out. And clean cdr valve.

It’s NOT a Cat. It’s a DPF. Diesel Particulate Filter.

 

[Pstyckiewicz]

let’s just say the diesel particles will be flowing a lot easier.haha

 

[Retiredwarhorses]

It’s NOT a Cat. It’s a DPF. Diesel Particulate Filter.

its a Catalytic Converter

 

[Coug]

Any vehicle with a particulate filter needs some method to do regeneration burns, which pretty much requires computer controls.
These trucks don't have computer controls for their engines/emissions.

 

[tomelroy]

I recently replaced the cat on my truck after inspecting it with a scope. Decided to see how bad it was and if it would be possible to remove it, clean it and reinstall. Here is what it looked like. Best performance upgrade yet.

 

[Mainsail]

Any time you suspect the cat might be ineffective or requiring diagnosis, you should perform the following system test:

1. Take lots of photos of the configuration of the heat shields to aid in reinstallation.

2. Remove the cat from the truck. Use a half-moon box end wrench to reach the top nut.

3. Stand the cat on end in the driveway on a block of wood and insert a stout length of re-bar (or similar) into the exhaust hole, straight down until it’s resting on the catalyst substrate.

4. Using a large striking tool, whale on the rebar for 10 to 15 minutes, attempting to drive it straight through the substrate.

5. Determine test results as follows:

If there is no damage to the catalyst substrate:

6. Reinstall the cat back in the truck using the photos taken in Step 1.

If the catalyst substrate sustains any damage whatsoever:

7. Repeat Step 4 until all the catalyst substrate, matting, and anything else in there is expelled out the opposite exhaust hole. Perform Step 6.

CAUTION: Do not stop executing Step 7 until the case is completely empty. Leaving any material may result in a complete blockage of the exhaust gasses.