Fault quantity setting in the fault memory

Hello everyone!
I'm new here, and I have to say, you have a great forum!

I found this forum because I'm looking for a solution to my "TDI problems."
I was just wondering if anyone would be willing to give me some advice.

Okay, let's start with my car: It's a Volkswagen Golf 3, manufactured in 1995, with a 1.9 TDI engine (1Z) that originally had 90 horsepower, but the previous owner told me it had been chipped to 115 horsepower. It has approximately 265,000 kilometers on the odometer.

A month ago, the preheating light in the cockpit started blinking. I read that this usually indicates an error code stored in the system. So, I took it to VW to have the error codes read. The error seems to be related to the fuel quantity sensor. I don't remember the exact wording, but it mentioned a faulty fuel quantity sensor. It's a sporadic error. At first, I thought the fuel injection pump might be misconfigured. I've now adjusted the engine control and fuel injection pump to 100% according to the specifications. I also replaced the glow plugs because one was faulty. However, the light is still blinking. It usually starts blinking about 30 seconds after turning on the ignition, regardless of whether the engine is started or not. In very rare cases, it doesn't blink at all. Also, I'm also surprised that the engine starts very poorly. It takes a long time to start, even when it's warm. Much longer than before.

I also installed a new alternator and a new radio, but I'm not sure if that's relevant.

At the workshop, they told me they needed to test the fuel injection pump to find the problem. Should cost 200 €.

Perhaps someone knows a solution? I would appreciate it.

Mfg Fibu 124

Hello,

If the chip tuning is "real" chip tuning, you can skip the following three sentences. Unfortunately, some providers sell so-called "power boxes" as chip tuning, which is unfortunately a misleading term.
In any case, such a device, if activated too early, could interfere with the engine control unit's quantity control test. Similarly, if it is set to be "too aggressive." See also technical articles comparing chips and boxes.

Unfortunately, there are still unpleasant possibilities for the described error, such as debris or wear particles in the fuel injection pump.

It's best to transcribe the error code exactly as it appears in the workshop's diagnostic report, so there's no misunderstanding about what's wrong with the car.

Best regards, Rainer.

Thank you for the quick response!
The chip has been implanted for years, and I've never had any problems. I just don't have any documentation related to the chip. But faith is something substantial.
The problem seems to be with the quantity settings... it's intermittent.
But if you need a more precise diagnosis, I also wanted to have the error codes read directly at VW.
Can I adjust anything on the quantity selector? Or, is it possible to rule out that the error has other causes?
I also have a feeling that the error is temperature-dependent.

Hello, I had the same problem with my A4 1.9 110hp, manufactured in 1998.
However, I was unable to clear the error. So, everyone said (I got the opinion of three different workshops) that the fuel injection pump is defective.
Okay, I replaced the E.Pumpe (electric pump), but the error is still there.
Then, there was only one thing left to do.
The engine control unit (ECU). "Silver linings: I got a used one for 75 euros."
By the way, if the quantity control valve is defective, it can be replaced (through Bosch service), but that's also not cheap.
You can also measure the current transformer yourself if you have a multimeter.

That's already an answer!
Sure, I have a multimeter!
But how do you do that?
Or, where can I find information on how to do that?

Send me your email address.

Hello!
I just went back to VW and had them read the error codes.

The error is: Intermittent quantity setting, N146.

Does anyone know anything about this?