Boost pin

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gcleanmick

Member
Posts
17
Hi guys just a quick one I've got a 300tdi 110 and I've just fitted a boost pin because I wanted more low down power, but the pin has made no difference what so ever, there was also a bit of black oil on the diafram, bit annoyed if I'm honest after reading a lot about the pin and paying good money, hope somebody has an idea why it's done nothing.
Regards Mick
 
Check that the pin inside the injection pump (the one that sits against the boost pin) is free moving, they sometimes seize up and need freeing up.
Also check there are no holes in the pipe from the turbo to the boost actuator (flying saucer on top of the pump).
 
To get more lowdown and progressive power. Increase fuel on fuel quantity screw then adjust idle back to normal on stops. If you do to much you will get smoke higher up the rev range so adjust carefully.
 
Mate, you need to make no adjustment at all. The Boost pin will only work noticeably if you are on factory settings. If you've already tweaked before putting the new pin in you'll have to wind it back.
 
Ive just fitted a Timber Trail to my 300 and am happy with it, I think oil on the diaphragm suggests an issue with the injector pump, have you seen the Timber Trail install video?.....

 
Last edited:
Coffeelandy said:
Mate, you need to make no adjustment at all. The Boost pin will only work noticeably if you are on factory settings. If you've already tweaked before putting the new pin in you'll have to wind it back.
Click to expand...

The boost pin will only work with turbo pressure, low down you don't have any usable turbo pressure. I was of course talking about increasing low down power and torque without buggering about with a boost pin. Using the method i describe is rather like adding a chip to an EDC unit. But carry on you know best.
 
paulnb said:
Ive just fitted a Timber Trail to my 300 and am happy with it, I think oil on the diaphragm suggests an issue with the injector pump, have you seen the Timber Trail install video?.....
Click to expand...

Black oil on the top of the diaphragm suggests a problem with the turbo not the injector pump.
 
give it a few clicks clock wise on the star wheel. then adjust the fuel pump underneath. will take a few tries to get the right fuel/boost mix. ive still got black smoke if im in the wrong gear with the foot to the floor.
I kinda like black smoking people though ha
 
Wammers is right about low down power, the pin only comes into play when you have usable boost pressure.

Oil on the top of the diaphragm needs investigating URGENTLY! Forget everything else for now.
 
Bloody he'll wish I never said owt lol, how can I check if the pump is at factory setting I thought it was with not having no where near as much grunt than my 200 tdi 90 I have just sold, also what would you check first with the oil on diaphram
Regards Mick
 
The pin also has to be orientated the right way to work effectively. Try rotating it say 30 degrees at a time then have a test drive.

I had a teaspoon of oil on top of the diaphragm when I opened mine. I was not concerned as the engine is about 20 years old, so that's a very small quantity over that time. I've removed the lid and checked a few times since and there was no oil there.
 
Couple of things concern me about oil on the diaphragm.

Mostly how it got there. Has to have come from the wrong side of the turbo unless I'm mistaken. I'd be checking for excess oil in the intercooler pipes and looking at the turbo bearing.

The other is if the boost pipe is gunked up it could explain the lack of power. Boost pressure pushes the diaphragm down and increases fueling, a split or blocked boost pipe will reduce fueling when the turbo is spooled up.

Returning the pump to factory settings isn't easy as you've no idea what has been adjusted or by how much. If the press in cap has previously been removed it probably has been adjusted.

Look up my threads for de-tuning a pump. It's slightly different as I was trying to return a pump to factory settings to run without a turbo and encountered a steep learning curve so make sure you read the whole thread to get an understanding.

There's links in the thread to 'common' adjustments made which would be my starting place to reverse them.

It's worth remembering that while a boost pin does increase fueling earlier (it has a steeper taper) than a standard pin it can only make any different when there is sufficient boost pressure from the turbo.

At low revs it can't have any effect on fueling, torque or power.
 
blue beasty said:
Couple of things concern me about oil on the diaphragm.

Mostly how it got there. Has to have come from the wrong side of the turbo unless I'm mistaken. I'd be checking for excess oil in the intercooler pipes and looking at the turbo bearing.

The other is if the boost pipe is gunked up it could explain the lack of power. Boost pressure pushes the diaphragm down and increases fueling, a split or blocked boost pipe will reduce fueling when the turbo is spooled up.

Returning the pump to factory settings isn't easy as you've no idea what has been adjusted or by how much. If the press in cap has previously been removed it probably has been adjusted.

Look up my threads for de-tuning a pump. It's slightly different as I was trying to return a pump to factory settings to run without a turbo and encountered a steep learning curve so make sure you read the whole thread to get an understanding.

There's links in the thread to 'common' adjustments made which would be my starting place to reverse them.

It's worth remembering that while a boost pin does increase fueling earlier (it has a steeper taper) than a standard pin it can only make any different when there is sufficient boost pressure from the turbo.

At low revs it can't have any effect on fueling, torque or power.
Click to expand...

I am impressed.BB. ;);)
 
wammers said:
I am impressed.BB. ;);)
Click to expand...

I int just a pretty face ya know :p

Truth is I knew nothing about injection pumps until I wanted to tweak one and then learnt 10 times as much trying to get my head round de-tweaking another one.

Knowing what to do is one thing. Understanding why is something else.

I couldn't have done it without valuable pointers and help from here and I'm happy to pass the bits I understand on.
 
I stand corrected about the source of the oil on the diaphragm....

I have fitted a Timber Trail boost pin to my 300, there is NO black smoke, it sailed through the MOT including emissions yesterday...its not a shove you back in your seat improvement, but it is noticable and I like it.....cruising at 60 is much more relaxed and refined.....can't say where but I clocked an easy indicated 95mph recently........braking hard on mud terrains was....well..........interesting!.... and buttock clenching!

If your engine hasn't been messed with and is in good condition, then I think you will see a difference, if not then I think it will highlight exisiting issues...you can't polish a turd!*



*Figure of speech, not suggesting the OP's truck is as such!......
 
blue beasty said:
I int just a pretty face ya know :p

Truth is I knew nothing about injection pumps until I wanted to tweak one and then learnt 10 times as much trying to get my head round de-tweaking another one.

Knowing what to do is one thing. Understanding why is something else.

I couldn't have done it without valuable pointers and help from here and I'm happy to pass the bits I understand on.
Click to expand...

If they have been played with you can't really get them back to standard unless they go on a machine. But i suppose you can get them close enough. We return to the people playing with things they don't really understand scenario. :D:D
 
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