Fuel inyection time deviation VW T6 2016 Caravelle

[cherey]

Hello, I want to put this post to know what these deviations in milliseconds of the injectors mean, it is taken with an obd2 bluetooth but I also have the vagcom in case you can help me know if it is normal or if there are improvements.

In the summer of 2023, the 4 injectors and the high pressure pump had to be replaced due to metal damage.

Thank you very much and I hope to learn more about this forum because you have a lot of experience in these vehicles and incredible vans!!!

 

[n10n]

This was engine idling?

It is normal that injector time deviates from 0 when idling, usually you see them more or less balanced like two above zero and two below zero. I'm not sure why it does this, but one guess would be that the injection quantity could be reduced further by spreading out injections a little bit in time - this would help reduce idling roughness while allowing for less fuel to be consumed.

The deviation should disappear when you give it some rpm.

Here's the deviation graphed through rpm: VW T6 Custom PID codes for DPF

 

[cherey]

¿Esto era el motor al ralentí?

Es normal que el tiempo de inyección se desvíe de 0 cuando está en ralentí, normalmente se ven más o menos equilibrados, como dos por encima de cero y dos por debajo de cero. No estoy seguro de por qué ocurre esto, pero una suposición sería que la cantidad de inyección se podría reducir aún más si se distribuyen un poco las inyecciones en el tiempo; esto ayudaría a reducir la aspereza del ralentí y permitiría consumir menos combustible.

La desviación debería desaparecer al darle algunas rpm.

Aquí está la desviación graficada a través de rpm: Códigos PID personalizados de VW T6 para DPF

Muchas gracias, ayer volviendo de Sevilla a Huelva, los 4 cilindros marcaban 0 desviacion a una velocidad de 120km/h, o sea que es lo que dices, miraré si en caliente también mantiene los 0microsegundos al ralentí, un saludo!!

 

[cherey]

This was engine idling?

It is normal that injector time deviates from 0 when idling, usually you see them more or less balanced like two above zero and two below zero. I'm not sure why it does this, but one guess would be that the injection quantity could be reduced further by spreading out injections a little bit in time - this would help reduce idling roughness while allowing for less fuel to be consumed.

The deviation should disappear when you give it some rpm.

Here's the deviation graphed through rpm: VW T6 Custom PID codes for DPF

Thank you very much, yesterday returning from Seville to Huelva, the 4 cylinders showed 0 deviation at a speed of 120km/h, so that is what you say, I will check if when hot it also maintains the 0microseconds at idle, greetings!!