T4 Injector nozzles on 110

brad1

Guest
just a warning, i did this to my car, and did everything by the guide, and car wouldnt start after, so i changed back to original nozzles and still wouldnt start, so i took my injectors to kent diesel centre who specialise in bosch etc and they said as soon as you take them apart to do what you have done, swap nozzles, they have to be recalibrated otherwise the car wont start, so god knows how you done it and the car started straight away?
 

jasengine

2.0L TDI
Oct 29, 2007
213
0
Wiltshire
Well I don't know what you did there, but they are not completely right in saying 'they need to be re-calibrated to get the engine running'. It is recommended that you get the injectors balanced after doing a nozzle swap as the 'crack off' pressure of the injector can be out. What they do is shim the springs in the injector body until all for units fire off at the correct pressure. You must have had air in the pipe work and nozzles still, not to get the engine to fire at all. Don't forget your injector nozzles would have had no fuel in after to took them apart.
I had to keep 2 injector pipes loose at the injector ends and spin the engine over until I could see fuel running down the injector body. Once this had be done on on all the injectors I then tightened all connections and spun the engine over until it fired, which probabily took 4 or 5 goes.
Once the engine had started, it ran rough for a little bit until the fuel was all through and then it was fine.

I then used VAGCOM to decrease the injection quantity slightly to smooth out the idle a bit and so the engine does not smoke too much at this stage as I have not got it remapped yet: I am only using a boost controller at the moment which gives me a higher boost pressure of about 1.2 bar constant, which will cut down of the amount of smoke to some extent.
 

brad1

Guest
Well I don't know what you did there, but they are not completely right in saying 'they need to be re-calibrated to get the engine running'. It is recommended that you get the injectors balanced after doing a nozzle swap as the 'crack off' pressure of the injector can be out. What they do is shim the springs in the injector body until all for units fire off at the correct pressure. You must have had air in the pipe work and nozzles still, not to get the engine to fire at all. Don't forget your injector nozzles would have had no fuel in after to took them apart.
I had to keep 2 injector pipes loose at the injector ends and spin the engine over until I could see fuel running down the injector body. Once this had be done on on all the injectors I then tightened all connections and spun the engine over until it fired, which probabily took 4 or 5 goes.
Once the engine had started, it ran rough for a little bit until the fuel was all through and then it was fine.

I then used VAGCOM to decrease the injection quantity slightly to smooth out the idle a bit and so the engine does not smoke too much at this stage as I have not got it remapped yet: I am only using a boost controller at the moment which gives me a higher boost pressure of about 1.2 bar constant, which will cut down of the amount of smoke to some extent.


i even left fuel lines off until i got fuel dripping down on each one, but still wouldnt start after cranking it over all weekend
 

basstard

Dropping Cogs is Useless
Aug 24, 2002
2,746
0
Roma, Italia
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I am only using a boost controller at the moment which gives me a higher boost pressure of about 1.2 bar constant, which will cut down of the amount of smoke to some extent.

1.2 constant is about the max pressure a VNT-15 can take,,, how many miles you did with this setup? that MAP sensor thingy looks cool but it's very expensive for what it is really and also I'd be too scared to kill the small 15,,,
 

jasengine

2.0L TDI
Oct 29, 2007
213
0
Wiltshire
I've done about 12k miles with it now. I don't drive it like I stole it though! It does give boost spikes upto 1.5bar, so got to take it a bit easy.

Your right is was an expensive box, even though I got it from Canada! Can't wait to get a remap!!
 

brad1

Guest
How strange. Well I take it you got the new nozzles on by the diesel centre instead?

i got my original nozzles fitted back on for time being, going to source a spare set of injectors and then get them fitted;)
 

Leon td

Active Member
Sep 4, 2017
1
0
Northern Ireland
I have a seat Leon 1.9 tdi 110bhp I swapped my injector nozzles to dsla150p764 the other day but haven't noticed much difference just wondering are they the wrong tips or what ones should I use to make it faster
 
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