What's broken? 10 cents with no effect

Today, I removed the 10-cent tuning and combined it with a delay circuit.
It works perfectly fine for me, or rather, for my boyfriend now.
With another friend, absolutely nothing is happening.
-WE ALSO ONCE tried connecting a 600-ohm resistor between cables two and three, and it didn't provide any additional power.
-The filament doesn't start to glow either.
He should actually be at this resistance value.
There is no noticeable improvement in performance.

What's broken?
Fuel injectors, or something else?

If you tell us what kind of car and engine your friend has, someone might be able to help you.

Volkswagen Golf 3, manufactured in 1995, engine code 1Z, approximately 150,000 kilometers.
I suppose it's safe to assume that a filament is needed for something of this size.
But what's the reason for this, or rather, what's broken or what's going wrong?

Early versions of the VP-TDI injection pumps were available not only with the HDK control unit (inductive), but also with potentiometers as sensors.
I cannot tell you whether your friend has such a pump, or whether any pumps were installed in Golfs at all.
You will gain clarity...
- regarding the identification number of the fuel injection pump (unfortunately, only available from Bosch or someone who can identify it), or
- if you unscrew the pump cover and look at the sensor, or
- measures the ohmic resistance between pins 2 and 3 of the pump connector; the expected values for the sensors have probably already been posted in the forum -> use the search function.

Best regards, Rainer.

I read in a post that the quantity setting device is broken.
Can a faulty quantity control device produce a 10-cent tuning signal, or does the 600-ohm impedance prevent it from doing so?
'Does anyone still have one of these lying around? And could you even install it for me (space requirements)?'

Actually, mine doesn't jerk, except when I'm in 5th gear at 60 and floor the accelerator; it just stutters for a moment.

suggermilk wrote:

I read in a post that the quantity setting device is broken.

I'm sorry, I don't understand. Can you please rephrase your request?

Quote:

Can a defective quantity setting device produce a 10-cent tuning signal that doesn't work, or does a resistance of 600 ohms prevent it from working?

Unlikely, at least the response characteristics must change.

Quote:

Does anyone still have one of these lying around, and could you even install it for me (room size)

???

Regarding the interlocking system, I meant to post that in a different thread:
'The 10-cent coin didn't work, and Bosch said the quantity setting mechanism is broken.'


Could this work? Because the tuning box switches the resistor on or off, and if I only use a 600-ohm resistor, it won't change the performance at all.

The resistor doesn't change anything about the coil, even though it's active.
The error should actually be in the signaling system.
Or?
Or what other potential issues could there be if the 10-cent tuning adjustment doesn't have any effect?

I've now reached 280 ohms with my ALH, and aside from the taste of the vapor, it's smoke-free.

Maybe I'll try installing a potentiometer sometime and see how it works...

CU Gremlin.

@ suggermilk:

Hey, great that you're bringing this up, it was actually my thread. I'm curious to see if anyone has any ideas.

I'm definitely sure I installed it correctly.
'I cranked up the resistance until it was almost at its limit, but the acceleration is exactly the same with the tuning on or off. There's not even a jerk when you engage full throttle. ??? '

It definitely has to be the pump .

DocSnydor wrote:

Hey, it's great that you're bringing this up, that was actually my thread. I'm curious to see if anyone has an idea.

First, measure the resistance between pin 2 and pin 3 of the fuel injector connector.

Best regards, Rainer.

@ Rainer

Do you really mean between 2 and 3?
Or do you want to know if we still have any vacancies?
Ulf actually asked me about it before, in relation to my problem. I already checked the inductive sensor (value was just below 6 ohms) -> but it was measured between pins 1 and 2...

Okay, but I'm going to quickly run out to the yard during my lunch break and measure the resistance between pins 2 and 3. (Are you saying I should disconnect the pump connector and measure directly at the pump's terminals?!)

Hello Doctor,

Whether it's between 1-2 or 2-3, it shouldn't matter, in my opinion, because you're only measuring a reference or measurement coil. When it comes to inductive sensors, low-resistance values are to be expected.

For understanding:
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Best regards, Rainer.http://www.dieselschrauber.de/mengenstell.html{MARKER}

Damn, our multimeter seems to be broken; the value is changing constantly...

I'll take another measurement at home tomorrow afternoon using my measuring device, and then I can post the results.

Best regards.
David.

Hello Doctor,

To determine whether the resistance is causing a change in the fuel injection quantity, you can simply use a VAG-Com device to access a measurement block within the engine control unit that displays the fuel injection quantity.
Under the same conditions (engine speed at idle, engine warm, air conditioning off, lights either always on or always off, etc.), the reported fuel injection amount per stroke must differ when the resistor is connected.
"If a value of 5.0 mg/stroke at 900 min-1 is displayed without a resistor between pins 2 and 3, a significantly lower value should be observed with a resistor, for example, 4.4 mg/stroke."
The actual amount of fuel injected to maintain the idle speed is still 5mg per injection, but the control unit is now being fed a value that is 12% lower than the actual amount by the sensor.
This means that in every operating point of the engine, 13.6% more fuel is being injected than intended.

Best regards, Rainer.

Hi Rainer,

That's interesting (and actually, it's totally logical). I never even thought about checking it using VAG-Com.

Okay, as I mentioned, tomorrow afternoon, when I get home, I can test everything. I'm curious to see what happens.

Thank you very much for the tip.

Sure, here is the translation of the text from German to English:

'So long'

This phrase is a common way to say goodbye in English. It is similar to the German phrase 'Auf Wiedersehen'.

Here are some other ways to say goodbye in English:

* Goodbye
* Bye
* See you later
* See you soon
* Have a good day
* Take care

I hope this helps!
David.