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One thing I learn is to not weld connections between wires under the bonnet, but to crimp it with the proper tool. I tried to properly weld some wires of AVCS solenoid, but after few days it started again to fluctuate. Same defect was back with no wires damaged. After checking the OEM spare vehicle ...

Now, problem is Fixed !!! https://nsm09.casimages.com/img/2020/09/23//20092308534924683417032862.png Both signals are ok and no more VVT Fail !! After lots of though and log analysis, I came to the conclusion that the ECU had many difficulties to control the AVCS solenoids, just like if they didn&qu...

I tried to check the famous banjo screen filter and decided to remove the banjo bolts that feed the avcs on the left side, where I have the problem. In the same time, I washed the AVCS rigid oil feed line. Guess what I found in the screen filter : an aluminium chip !! (bottom right on the picture) i...

One more element to my misterious variation. Today I drove for around 1h30. I had 2 VVT fails at the begining and when engine was hot for around 30 min, both AVCS signals came back suddenly at the same level and were very "clean". No more fluctuation during 1h, all was really perfect..... ...

If it can help; this is the same log with different VVT parameters logged. Same horizontal axis scale https://nsm09.casimages.com/img/2020/08/06//20080610422224683416952572.png https://nsm09.casimages.com/img/2020/08/06//20080610422224683416952574.png https://nsm09.casimages.com/img/2020/08/06//2008...

The mapping was not made by me, but by an official mapper. I compared the values in the tables and for both VVT1 and VVT2 they are absolutely the same. (brake points, target, duties etc etc) I zoom out the same curve and see that there is clearly a problem with VVT1. VVT2 is respect what is in the m...

I'm back again with my problem and now I have regulary VVT Fails and I'm very often in Limp mode. I already changed both AVCS Solenoid and pulley by new OEM ones. I double checked the wiring and the connexion. Everything seems OK. What I don't understand is that suddenly the VVT1 signal always stick...

Hello,
I have a S6 PnP on my GC8 and the red light is switching off when engine is running as before I'm switching the OEM ECU.
...sorry

Ok, good idea. I think it could be the moment to make a grounding kit and see if it solve this issue.

TimH, based on your experience, does your customer solved their problems or, at least, improved their situation with grounding ?

Thanks guys

Oil pressure sensor is STRI : https://www.stri-racing.com/replacement-sensors/replacement-dsd-oil-pressure-sensor Oil/Fuel pressure sensor , suitable to most universal application/gauges and other measuring devices* * 5VDC 0 ~ (+1,000) kpa 1,000 kpa (approx 10Bar) 0.5 ~ 4.5 VDC I have coil on plug f...