1Z engine spring not engaging properly

Hello everyone, I'm new here and I already have a brain-teaser for you.

I'm having a problem where my 1Z engine (Passat 96) is difficult to start, both when it's cold and when it's warm.
Fuel system is leak-free, filter is new, glow plugs are new, the error memory is clear, and the valve timing is also correct. The crankshaft gear is also stuck, I hope you have an idea!

Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.

What about the start of fuel injection for the fuel pump?
'There is air in the fuel system! (possibly due to a faulty O-ring on the diesel filter).'
Is the fuel tank vent working correctly?

Hello,

Okay, so I let the engine run until it reaches operating temperature, then I turn it off and immediately try to start it again. It then takes several seconds to start, as if there's air in the system (but there definitely isn't). The EDC pump should deliver the maximum fuel injection amount during the start-up process. It seems to me that there's a moment during the start-up process where it takes some time for the pressure to build up!

Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.

hello,

These are not answers to the questions!

If the engine has been running and you turn it off, do you see air bubbles in the transparent hoses connecting the diesel filter to the fuel injection pump?

I am repeating the questions again:
What about the fuel injection pump? Has it been dynamically adjusted correctly? After starting the engine, is there any white smoke or uneven engine running?
'There is air in the fuel system! (Possibly a problem with the O-ring on the diesel filter).'
Is the fuel tank vent working correctly?

hello joergs,

'I'm sorry, but there are no visible air bubbles in the plastic hoses. Also, there's no white smoke visible when it starts. When it does start, it runs roughly unless I repeatedly press the accelerator (VL). Then, sometimes, it emits bursts of black smoke from the back, and the engine runs very unevenly (feeling like only 2 or 3 cylinders are working).' If you start it, it will hesitate for a moment, then be difficult to start, but it will eventually run smoothly on all cylinders again.
The diesel filter is new. I just checked the O-ring again. I've checked the fuel pressure multiple times, and it's reading 0.96. The fuel vent is also working correctly. What's also surprising is that the N75 valve (boost pressure control valve) is constantly clicking when the ignition is on!


Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.

How did you check the free play? Statically with a gauge, or dynamically with a diagnostic system? And if with a diagnostic system, hopefully in the basic settings?

'Your 0.96 value at the start of the funding period, what does that refer to? If my memory of the 1Z is correct, there's nothing about a 0.96 value there. I suspect it might be a measurement reading?'

What about the KW screw, which has been discussed many times here? Has the appropriately modified one already been installed, or is it still the old 8.8 version? A loose KW wheel could also be the cause!

Hello Habe,
Measured with a timer and diagnosed, the display field 2 oscillates between 45 and 51, which is also acceptable.
'The crankshaft position sensor (CKP) screw is stuck. I've also checked the ignition switch. Have you experienced any problems with the fuel pump before, or is this a known issue?'

Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.

However, the 0.96 value is puzzling me! If I remember my 1z correctly, it should have been 0.7 ± 0.02!

You're right, but with that .96 setting, it should start up better, so we can probably ignore the feedback (FB) for now!
I've never encountered a problem like this before!
Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.

At 0.96, the timing is either significantly too early or significantly too late (probably too late), which is why your vaporizer isn't starting well and is likely sputtering when you accelerate.

Hello,

Quote:

...you are right, but with these .96s, ...

What about .96 eggs and milk? A setting value also includes a unit of measurement.
What is it? 0.96° from the vertical? mm?

Quote:

Display field 2 between 45 and 51 is also okay

.
Nonsense.

What is display field 9 doing at the same time? The adjustment diagram still has 2 axes. Did you not check the value in field 9? Just leave the adjustments as they are.

Okay, here's a basic question:
- Measurements have units.
- Using a tachometer is not recommended for checking the static settings of the ESP (Electronic Stability Program) in TDI (Turbocharged Direct Injection) engines.
- Questions posted in the forum should be answered. If you don't, you should probably refrain from posting.

Last chance for the questioner: Is the hiring process based on...?
/viewtopic.php?t=3195 now exactly as described in there?

Best regards, Rainer.

Or simply check the battery capacity! = Insufficient engine starting speed (300 RPM is the minimum).

Hello Rainer,

0.96 mm is a common size, and as you mentioned: (not recommended for TDI engines).
and the numerical value is 45 to 51 (without unit indication, according to...). VW)
Okay, display field 9 has a numerical value of 102.
I didn't adjust or change anything, I only took measurements!!!!!!!!

Okay, so if you know that the target value is 0.70 +/- 0.02, and you measure 0.96, then you know that the pump is set too early!

I prefer to trust VAGCOM and haven't tampered with the pump!

Where is the nonsense now?

I'm having a starting problem, and I was hoping someone here might have experienced the same issue before!

Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.

Hello Julian,

The battery is also OK .

Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.

Okay, my opinion is that the fuel injection timing is incorrect! The symptoms are similar to those described in Heahnlein's cold start thread, where the issue was related to the fuel pump timing. How did you measure the fuel injection timing dynamically? Hopefully, you did it using the default settings?

Hello,
Certainly, the preheating lamp blinked during the measurement!

Sure, here's the translation:

'MFG' is an abbreviation for 'Mit freundlichen Grüßen,' which translates to 'Sincerely' or 'Best regards' in English.