2.0TDI CR "Rail Pressure Calibration Point" - big minuses everywhere!

[SMN204]

Hi!
WV Passat 2.0TDI CR CBAB 2009 (300 000 km mileage).
The motor is running fine at the moment with no visible faults!
Question about injectors

Here are the parameters in measuring blocks 72-75 "Rail Pressure Calibration Point"

Injector 1: rail pressure calibration point 1 - 56.00 ms
Injector 1: rail pressure calibration point 2 - 27.00 ms
Injector 1: rail pressure calibration point 3 - 33.00 ms

Injector 2: rail pressure calibration point 1 - 18.00 ms
Injector 2: rail pressure calibration point 2 - 21.00 ms
Injector 2: rail pressure calibration point 3 - 26.00 ms

Injector 3: rail pressure calibration point 1 - 20.00 ms
Injector 3: rail pressure calibration point 2 - 26.00 ms
Injector 3: rail pressure calibration point 3 - 28.00 ms

Injector 4: rail pressure calibration point 1 - 39.00 ms
Injector 4: rail pressure calibration point 2 - 36.00 ms
Injector 4: rail pressure calibration point 3 - 38.00 ms

There are minuses everywhere and not small ones!
How do you comment on this? Should I change the injectors or not?
I repeat - there are no remarks to the work of the engine. Compression is normal.

 

[Uwe]

How do you comment on this? Should I change the injectors or not?

I don't know what those numbers mean, but if the engine runs well, why would you replace the injectors? CR injectors are expensive!

What do your injector quantity deviations look like?

-Uwe-

 

[SMN204]

What do your injector quantity deviations look like?

Injection Quantity Deviation: cylinder 1 -0.19 mg/str
Injection Quantity Deviation: cylinder 2 -0.45 mg/str
Injection Quantity Deviation: cylinder 3 +0.35 mg/str
Injection Quantity Deviation: cylinder 4 +0.21 mg/str

I was looking at TPI # : 2015838/5
(but it's for a different engine. BMK BKS)


Read the measured value blocks 72 - 77.
3 values per measured value block are shown. These are adaptation values of the individual cylinders at different pressure stages (300, 600 and 1000 bar).
Should the values of digit 1 be higher than -45 ms (e.g. -60ms) or of digit 2 higher than -15 ms (e.g. -20ms), the needle attachment is worn and the injector is incorrect.

 

[SaVAGeSoot]

I've attempted to find answers about the 3 various calibration points in the past, and have failed......
I believe I have a post on here somewhere.... I'll see if I can locate it....
@JMR has a fancy thread where he's tracking CR deviations which may also interest you....

 

[SaVAGeSoot]

Here you go....
2014 Touareg TDI - CNRB - looking for knowledge on injector calibration points
PD and CR Injectors -- Normal Compensation Rates for Reference Comparison

 

[SMN204]

2014 Touareg TDI - CNRB - looking for knowledge on injector calibration points
PD and CR Injectors -- Normal Compensation Rates for Reference Comparison

I'm concerned about my "Rail Pressure Calibration Point"....-56ms..... and similar minuses on all 4 injectors (much more than -45ms for the first point and -15ms for the second point).

My "Injection Quantity Deviation" parameters are normal!

And repeat - there are no remarks to the work of the engine.

 

[SaVAGeSoot]

I'm concerned about my "Rail Pressure Calibration Point"

Pretty sure that's why I posted that first link based on my previous comment

I've attempted to find answers about the 3 various calibration points in the past, and have failed......
I believe I have a post on here somewhere.... I'll see if I can locate it....

 

[SMN204]

Pretty sure that's why I posted that first link based on my previous comment

I've read it, thanks!

The info (I think) about the 3 various calibration points is from TPI 2015838/5 only!
And the limits, -45ms for the first point and -15ms for the second are taken from there.

 

[SaVAGeSoot]

I understand where you are getting the info from, but I'm not sure it's really sure it's applicable since it's from different engines and tech....
Have you looking into the injectors? Are they the same type\spec? I know over the years, CR injectors have changed as HPFP have improved and been able to deliver more pressure, etc.

 

[SaVAGeSoot]

I'd go as far as taking a guess that the older v6 you're referencing was using CRI3-16s and the four banger is using CRI2-18s, so they are designed for different pressures, etc.

 

[SaVAGeSoot]

The more I think about this, the more different the two setups are.... didn't the early BKS setups use the CP3 pumps vs the CP4.1 in your Passat?

 

[SMN204]

didn't the early BKS setups use the CP3 pumps vs the CP4.1 in your Passat?

In my Passat (CBAB) CP4.1 pump
BKS has CP3

P.S
I haven't seen values anywhere on motors like mine in similar to my big minuses (ms) как у меня in calibration points

 

[SaVAGeSoot]

In my Passat (CBAB) CP4.1 pump

Is there an echo in here? Or what's your point?

 

[SMN204]

I will remove the injectors to make a test on the dealer's Bosch EPS 815 Pump Test Stand
This is better than guessing and waiting for trouble....