T

TR3a

Active Member
I am not sure if my turbo is good or bad....so have sent it away to get checked

However...............

When removing it I found diesel fuel in the boost actuator, which presumably came from the injection pump.

Is there a seal or something that can be replaced.

Also.........

I want to check that I have the FIP/Filter pipes connected correctly..........

I currently have....

No.1 on the filter going to FIP connection near the stop solenoid.
No. 2 on the filter to outlet of lift pump.
No.3 on the filter to FIP connection nearest the idle adjustment.

Which are the in and out ports on the FIP?

I am not sure if 2 and 3 are crossed over.

Help much appreciated........this is the problem in buying a box of bits and not having worked on a diesel before.
 
TR3a said:
I am not sure if my turbo is good or bad....so have sent it away to get checked

However...............

When removing it I found diesel fuel in the boost actuator, which presumably came from the injection pump.

Is there a seal or something that can be replaced.

Also.........

I want to check that I have the FIP/Filter pipes connected correctly..........

I currently have....

No.1 on the filter going to FIP connection near the stop solenoid.
No. 2 on the filter to outlet of lift pump.
No.3 on the filter to FIP connection nearest the idle adjustment.

Which are the in and out ports on the FIP?

I am not sure if 2 and 3 are crossed over.

Help much appreciated........this is the problem in buying a box of bits and not having worked on a diesel before.
Click to expand...
Boost pressure diaphragm is in a small housing under the Injector pump, connected to the turbocharger by a thin plastic tube.
You can change it, and sometimes it will deal with the issue, if not, you will have to look deeper in the pump, which is probably a job for Diesel Bob or similar injection specialist.

From memory, the intake to the Injector pump is at the back of the pump, the outlet at the front. Might be wrong about that, it is a few years since I had a 19j.
There should be inlet and outlet arrows on the Filter head.
 
Last edited:
TR3a said:
I am not sure if my turbo is good or bad....so have sent it away to get checked

However...............

When removing it I found diesel fuel in the boost actuator, which presumably came from the injection pump.

Is there a seal or something that can be replaced.

Also.........

I want to check that I have the FIP/Filter pipes connected correctly..........

I currently have....

No.1 on the filter going to FIP connection near the stop solenoid.
No. 2 on the filter to outlet of lift pump.
No.3 on the filter to FIP connection nearest the idle adjustment.

Which are the in and out ports on the FIP?

I am not sure if 2 and 3 are crossed over.

Help much appreciated........this is the problem in buying a box of bits and not having worked on a diesel before.
Click to expand...
Forgot. I think there is a fuel flow diagram in the manual.
 
Thx,
My pipes are connected correctly, just checked.
Now need to understand why I've got got fuel in the wastegate actuator.

Anyone know how the boost control system works. I am guessing that the FIP has some sort of compressor in it that moves the wastegate actuator on the turbo. Pressurising the actuator to open the wastegate, presumably to reduce boost pressure.
 
TR3a said:
Thx,
My pipes are connected correctly, just checked.
Now need to understand why I've got got fuel in the wastegate actuator.

Anyone know how the boost control system works. I am guessing that the FIP has some sort of compressor in it that moves the wastegate actuator on the turbo. Pressurising the actuator to open the wastegate, presumably to reduce boost pressure.
Click to expand...
Coming up the plastic pipe from the split diaphragm. There is fuel behind it, but should be air in front, in your case there is fuel both sides, because the diaphragm is split.
When the system is working properly, the diaphragm moves a little bit in response to changes in fuel pressure behind it.
This changes the air pressure in front of it, and that air goes up the little tube, and increases boost on the turbo.
The wastegate itself is mostly moved by exhaust gases, the little unit fine tunes the opening.
I wouldn't worry about it too much. Just get a diaphragm, changing it is pretty easy. If it splits again straight away, probably best to send the pump off for testing and rebuild.
 
Think this tells you how to change diaphragm.
 

Attachments

  • 19J DPS CAV pump -The symptoms of a split boost diaphragm are easy to identify.pdf
    659.4 KB · Views: 363
Took the diaphragm out today.....see photo.
20210415_164217.jpg
20210415_164217.jpg
 
Success definetely faulty and cannot even blame Britpart rubber quatlity hope your new one is a good quality as it looks awkward to get at.
 
New one fitted.....not too difficult. Engine now runs fine. Also had the turbo rebuilt by Cats and Carbs.
 
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