rudder_nz
Member
Hi all. I appreciate the help in advance.
Videos I managed to capture. They miss the first 10 seconds or so and you cannot see the exhaust smoke.
https://photos.app.goo.gl/AKFCHDv1NBaNhKED7
https://photos.app.goo.gl/viYmsUoFyYjcYaRRA
Symptoms: black smoke, no power, violent erratic revs. Lasts for about 5-20 seconds. No CEL. no fault codes when scanned with VCDS. Happens at any speed and also when engine is hot or cold. Engine is completely unusable when it happens.
This only happens once every week or so but seems to be getting more frequent. Putting it in sport mode doesn't resolve the issue. Only happens once per drive then resolves.
Plenty of power and the car drives great when it isn't having this issue.
I am no master with the VCDS but I cannot see any issues. Are there any meassuring blocks I should look at? The injector wear values were less than 0.5 difference.
I have replaced Diesel filter, air filter, tandem pump (previously had a small leak) .
My local mechanic and a Diesel and Turbo specialist had no idea.
My hunch is a sensor is giving intermittent bad signals and putting in too much Diesel or not enough air.
Let me know what I should try to diagnose this issue. I can do any scans needed with the VCDS.
Thanks everyone.
Videos I managed to capture. They miss the first 10 seconds or so and you cannot see the exhaust smoke.
https://photos.app.goo.gl/AKFCHDv1NBaNhKED7
https://photos.app.goo.gl/viYmsUoFyYjcYaRRA
Symptoms: black smoke, no power, violent erratic revs. Lasts for about 5-20 seconds. No CEL. no fault codes when scanned with VCDS. Happens at any speed and also when engine is hot or cold. Engine is completely unusable when it happens.
This only happens once every week or so but seems to be getting more frequent. Putting it in sport mode doesn't resolve the issue. Only happens once per drive then resolves.
Plenty of power and the car drives great when it isn't having this issue.
I am no master with the VCDS but I cannot see any issues. Are there any meassuring blocks I should look at? The injector wear values were less than 0.5 difference.
I have replaced Diesel filter, air filter, tandem pump (previously had a small leak) .
My local mechanic and a Diesel and Turbo specialist had no idea.
My hunch is a sensor is giving intermittent bad signals and putting in too much Diesel or not enough air.
Let me know what I should try to diagnose this issue. I can do any scans needed with the VCDS.
Thanks everyone.