Passat 3C - Probleme beim Starten des Motors (1.4 TSI, CAXA) | Posts 32+

Well, misfires do occur, and they last for about 20 seconds, distributed across all the cylinders. After 1 minute, the counter resets.
Now we need to see what else might be wrong. Are there any data available about the individual injectors? Engine speed and engine temperature would always be helpful.
Question for the gasoline engine faction: Is the early ignition timing okay?
hg
Herbert.

Hello,

Here's another log from today (also without a specific issue), but with additional measurements.

What I notice here is the temperature of the intake air. Is the air being heated before it reaches the sensor?
Or could there be a defect here?
According to the dashboard display, the temperature inside the garage was approximately 16 degrees Celsius, while the outside temperature was around 7 degrees Celsius.

Thank you and best regards.

"20° intake air temperature suggests a problem with the temperature sensor or the wiring. It shouldn't be that warm in location F."
hg
Herbert.

Assuming the intake air temperature sensor is located behind the TL (presumably a component or part of the engine), and considering that the water temperature was still 19°C, or that the engine hadn't fully cooled down, I could reasonably expect a reading of 20°C. It would be necessary to compare these values when the engine is completely cool, or to measure the actual temperatures with a thermometer.

Hello,

Yesterday, I accidentally had the ventilation and radio turned off in the car, and that's when I noticed a high-frequency, irregular "buzzing" sound coming from the rear of the vehicle. Today, it was there again.

The noise appears after the device is turned on and persists.
Could that be the pre-charge pump?
If so, is there a way to check that using VCDS?

Hello,

Here's another update on what has been done to the vehicle:
- Timing chain, variable valve timing unit, sprockets, etc. replaced.
- New pump installed in the tank.
- Last MSG update installed.
- Shift cable replaced.

What is still being done:
- Clutch release bearing will be replaced.
- Replace pendulum support bearing.

I had hoped that the update to the MSG and the replacement of the pump would have resolved the starting problem.
Unfortunately, it has happened again after just 2 weeks.

Best regards,