TDI Cold Start 1Z 90PS

Hi, my Passat TDI is very difficult to start in the mornings; it often takes minutes of cranking before it starts (starting spray in the air filter helps). There are no air bubbles visible in the diesel lines (I've had that problem before), and it's not the glow plug system either.
In addition, a new problem has recently started occurring: while driving, the car occasionally stops responding to the accelerator pedal, but maintains its speed. After shifting gears, it then starts working again.
Reading the error memory revealed the following:
2 Faults Found:
01117 - Generator Terminal DF Load Signal.
27-10 - Implausible signal - Intermittent.
00550 - Start of Injection Regulation.
17-10 - Control Difference - Intermittent
The second error is probably the most interesting one.
I read that it could be the needle lift sensor or the fuel injection start valve (N108).
Could these parts be responsible for the poor starting performance?
When the car is parked on a slight incline (with the engine facing downhill), it seems to start better (or at least, that's my impression).

Does anyone have any ideas?

Regards,

DICC

The 01117 code doesn't matter; I and others have it constantly, without noticing anything.

The starting rule for sprints, "Error is there already," is quite interesting.

Let's try the usual approach.
- Clear the error and associate its recurrence with the problem.

But the way you're parking makes me think you might have air in the system (which would also explain the error message, because the self-balancing system can't regulate properly when there's air in the pump).

Okay, please check if you see any air bubbles in the transparent hose leading to the ESP (Electronic Stability Program) and try to identify where they are coming from.

m;

Hi, as I said, there is no air in the hoses, even during starting. The outside temperature also doesn't play a role!
Regards,
DICC

dicc wrote:

Hi, my Passat TDI is very difficult to start in the mornings; it often takes minutes of cranking before it starts (starting spray in the air filter helps). . .

Have you read it yet?
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

Recently, we had a case here with poor compression, and starting spray didn't help -> search function.

'Hey, I know that problem... same symptoms. I replaced the starter because the starter motor speed seemed too low, but it didn't help. Then I replaced the ESP (Engine Control Unit). It starts again, but it takes longer to crank, but I don't need starting fluid anymore. The cause is poor compression in two cylinders. I also had a fault code related to the injection timing control module. However, it only appeared under full load, usually when going uphill!'

Crankshaft pulley loose?

Hi,
'The tips are great, but I don't think they have anything to do with my problem! The timing belt was replaced 10,000 km ago, and nothing seems worn out...'
I think it might be related to error code 550. If the problem occurs while driving, the engine emits incredible amounts of white smoke!
'Where is this valve 108 located, and can it be replaced by myself? What is the price, etc.?'

Regards,

DICC

'Where is this valve 108 located, and can it be replaced by myself? What is the price, etc.?'


below, in the fuel injection pump...
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

If the device is defective, it often requires a major repair.

I would check the system for air bubbles again, and also inspect the tightness of all the connections.
A common cause of overheating is often the thermostat on the diesel filter.

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

'Cu Gremlin'

hi, es ist keine luft im system,das thermostat gibt es garnichtmehr (anderer filter) !
habe ich schon alles geschreiben!
wenn ich alle antworten mal so zusammenfasse kann ich die fehlermeldungen ignorieren oder was soll ich davon halten??
dicc

Ich tippe auf ein loses Kurbelwellenrad.

Einfach mal die Grundeinstellungswerte in täglichen Abständen prüfen/ loggen und gucken ob sich was verändert.

Grüße, Rainer

dicc wrote:

Wenn das beschriebene problem während der fahrt auftritt stösst der motor unglaubliche weisse raumwolken aus!!

Ich denke mal, Du meinst Rauchwolken

Ich hab die Bedeutungen der selteneren Qualmfarben zwar nicht sicher drauf, aber weiß bedeutet IIRC am ehesten Wasser. Kann man aber wohl ausschließen, denn Wasserverlust tritt nicht in "scharfen Zeitfenstern" auf..?

Dann könnte es unverbrannter Diesel sein (hellblau / grau?).
Und wenn das sogar während der Fahrt passiert, dann kann IMO nur die Einspritzzeit soweit verrutscht sein, daß nicht mehr alles verbrannt wird.
Demnach wäre der Zahnrementrieb (KW-Ritzel!) ein heißer Kandidat, oder auch die Aufhängung / Befestigung der Pumpe.

Denn der Spitzversteller alleine hat normalerweise nicht soviel Spielraum, daß Diesel unverbrannt bleibt

Quote:

Zahnriemen wurde vor 10tkm gewechseln nichts ist ausgeschlagen ....

Unzulässige Folgerung:
Bei Murks während des Wechsels kann 10Tkm später sehr wohl was ausgeschlagen sein, der (beginnende) Defekt kann beim Wechsel auch unerkannt geblieben oder insgesamt erst später enstanden sein

hi,
noch etwas: manchmal springt der motor im kalten zustand normal an, wenn man Ihr dann nach kurzer zeit wieder ausmacht (ca. 1min, hatte etwas in der wohnung vergessen) springt der motor micht mehr an ! ist mir 2mal passiert!!
DICC

kurbelwellenrad! prüf die steuerzeiten und beobachte sie.......

nutz die suche zu diesem thema und du wirst deine probleme in zig threads wiederfinden!