Difference between ALH and 1Z nozzles!

Hello, I'm new here!

My name is Frank.

I own a Mitsubishi Eclipse with a 4G63 engine and recommended a TDI ALH 90PS Golf IV (2000) Variant to my father about 3 years ago. Before that, he had a 109 PS petrol Berlingo.
(It was a big change, but he's happy) However, he still can't get used to the pulling power and the 'break'. Now, my question to you:
What are the differences between the 1Z and ALH injectors?

Have you noticed that the nozzles from 1Z to ALH
have different sizes?
I've never heard about this in any forums. Everyone says that there are 0.185 inch nozzles,
but I recently read on a website that there are 0.170 inch ones instead !!!!
What now? This would explain the annoying performance issues that are often described in forums, especially for the ALH.
(smaller hole diameter, greater forces for pump etc.)

If anyone has more information, please post!
The internet page was called Kerma-TDI.
I am considering installing larger nozzles.

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I haven't heard anything about this in any forums. Everyone says that there are 0.185 inch nozzles, but I recently read on a website that they are 0.170 inch! What now? This would explain the (often described in forums) frustrating performance issues, especially with the ALH.

ALH with manual transmission has a two-spring holder (220 bar) with 0.185 inch nozzles / 10mm pump / VTG
ALH with automatic transmission has a two-spring holder (220 bar) with 0.158 inch nozzles / 11mm pump / VTG

I'm driving it now, and there's absolutely nothing wrong with it!

1Z has a fuel injector holder (190 bar) with 0.184mm nozzles / 10mm pump / wastegate charger

If the ALH is pulling poorly or experiencing stalls, something is DEFINITELY wrong!
-> technical article for troubleshooting

CU Gremlin

Gremlin wrote:

1Z has a spring holder (190 bar) with 0.184mm nozzles / 10mm pump / waste gate loader

As far as I know, the 1Z has a two-spring holder!
Until 06/92, the spring holder was used (at least on the Audi B4),

Gremlin wrote:

1Z has a spring-loaded valve (190 bar) with 0.184mm nozzles / 10mm pump / waste gate controller

So, my 1Z also had a double spring valve...

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Hello! !

First of all, thank you for your responses. :)

I already knew that the 1Z was the original model. However, the kermatdi.com website actually confused me. It stated that the 1Z with 0.185 = 105% and the ALH with 90 PS despite having a gearbox, had a 0.170 = 100% value.

The percentage figures are supposed to represent the relative size of the opening compared to the 1Z.

My question now goes in this direction. Since I only need a little more performance and am considering replacing the existing nozzles, I don't want to jump two sizes up at once, especially since the ALH with ASV nozzles might have a higher soot emission.
If the 0.185' nozzles would also be sufficient. (Maybe I'm just misinformed based on the page you mentioned?)
Otherwise, there's no question, and I'm installing ASV nozzles.

For pushing and breaking:
I have logged with VAG (test drive) but I lack the necessary knowledge for the evaluation.
The boost pressure reaches the upper limit of the graph and the injection volume per stroke is
at 3000 rpm at 49 mg/stroke

Oh, there is air in the clear suction line between the filter and the ESP!
I have already tried to fix this, i.e. a new filter and new O-rings, but there is no change.

Otherwise, there was nothing in the fault memory.

Maybe the LMM is the problem?

Eclipse_Fahren_TDI_Know wrote:

Ah, there's air in the clear suction line between the filter and the ESP! [/u]

This might be the cause. If air gets into the ESP, the fuel injection adjustment will no longer function!!!

Thanks, Wolfi, for the tip!

I've known about the issue with the air for about 2 months, but it seemed like everyone else was fine on the forum.
It seems like this has happened before. Some people said that the pump would compensate, but I had a bad feeling about it. In short, tomorrow my dad has an appointment with the mechanic for an inspection. They will be looking in the direction of your suspicion. He's not sleeping well because he wants to visit me at the end of the week.
It's about 400 km. As for me, I'm probably lucky with my Eclipse, it has 260,000 km on the odometer, and I would only need to fill up to be sure that I can rely on it.
Speaking of which, it's interesting with the TDI's, otherwise I wouldn't be doing this!

EDIT by guste100: Duplicate post deleted

Hello!

After my dad had inspected the car, the possible cause was initially mentioned as the air pressure regulator, but later it was, of course, the Bosch LMM that was the problem.
However, the problem with the air in the intake line to the ESP was not resolved.
Could someone perhaps explain again what happens if, as Wolfi says, the entire fuel injection system no longer works? Isn't that a fundamental issue?
Incidentally, air in the system can never be good, as air can be compressed, unlike liquids. And another consideration would be water in the diesel filter due to condensation, especially in the summer. This would then, of course, cause damage to the ESP.
DIESEL INSTEAD OF RME TANK?

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