Fuel injection time deviation... What does it mean???

[Derek99B]

From my VCDS

CXEB 150120 Miles engine cold to 70DegC tickover around 10 minutes.

IDE12085 Fuel injection time deviation: cylinder 1 12 us
IDE12086 Fuel injection time deviation: cylinder 2 -75 us
IDE12087 Fuel injection time deviation: cylinder 3 32 us
IDE12088 Fuel injection time deviation: cylinder 4 32 us

Have I got a problem???
Is injector 2 faulty???
Is this the reason foir excessive soot on the DPF ???
Thanks in anticipation.

 

[n10n]

It’s pretty normal that some of them are positive and some negative. The overall sum of them is close to zero and they should all converge to zero with more rpm.

For comparison, see mine in VW T6 Custom PID codes for DPF

I don’t know if your values are exceptional though.

 

[Derek99B]

It’s pretty normal that some of them are positive and some negative. The overall sum of them is close to zero and they should all converge to zero with more rpm.

For comparison, see mine in VW T6 Custom PID codes for DPF

I don’t know if your values are exceptional though.

Hi
Thanks. I'll check it at 70mph later today.

 

[n10n]

Hi
Thanks. I'll check it at 70mph later today.

No need to take risks for this - parked and engine running, just flooring the pedal for couple of secs is fine. The range of my graph was just 6 seconds!

 

[Dm85]

been trying to track down a bit of a rough idle….I logged injector time deviation at idle and then floored the accelerator and they converge to 0 but at idle not sure if the readings are off?

 

[n10n]

been trying to track down a bit of a rough idle….I logged injector time deviation at idle and then floored the accelerator and they converge to 0 but at idle not sure if the readings are off?

View attachment 260833

Deviation values on idle seem bit high as compared to mine (in example linked above my CXEB seemed to hover at < ±15us) but I’m not sure if it really means anything. Could be normal due to eg engine / fuel / intake air temperatures. Also what engine is this?

 

[Dm85]

Deviation values on idle seem bit high as compared to mine (in example linked above my CXEB seemed to hover at < ±15us) but I’m not sure if it really means anything. Could be normal due to eg engine / fuel / intake air temperatures. Also what engine is this

Deviation values on idle seem bit high as compared to mine (in example linked above my CXEB seemed to hover at < ±15us) but I’m not sure if it really means anything. Could be normal due to eg engine / fuel / intake air temperatures. Also what engine is this?

its a 150 CXHA DSG remapped. Basically I had a fly wheel replaced in February and I’ve gotten increased vibrations lately and the company are saying something must be Causing the fly wheel to rattle. They are saying compression test it and look at injectors. They maybe be right in that but just thinking vcds maybe able to point me in the right direction. No loss of power just vibration. Mounts replaced etc……

 

[n10n]

Check out below thread for other ideas on what to observe with VCDS. Not saying it’s the same issue - just that the thread has some good diagnostic steps to compare with.

Lumpy T6 - Triggers Broom! Misfire & Vibration under 1500rpm.

Hi All, I have a 2018 T6, that I'm running out of patience with... and garages... So I have purchased VCDS to try and get to the bottom of it... First issue was it started to use coolant, I swapped a known good charge cooler to eliminate that, Max to min in around 100 miles, So took it to VW...

www.t6forum.com