|11-12-2019 02:19 PM|
|[email protected]||Yeah, the oil viscosity is an interesting data point and I considered going heavier weight, but didn't considering we're going into winter and I still plan to drive the car some. I'll keep that in mind for the next oil change. I mean, it's plausible that there was some viscosity drop after an hour of highway running that led to shenanigans, but seems unlikely with a modern synthetic. Maybe the old girl just needs the classic "Italian tuneup" and I should sign up for a track day, lol.|
|11-12-2019 08:00 AM|
|robgreg75||I did a little looking too out of curiosity and I see some Audi owners are going to thicker oil to help eliminate issues. I run 15w50 in mine.|
|11-11-2019 03:02 PM|
I have been digging for Audi information. I'm still pursuing that, although it's a bit like WebMD. It ranges from "oil is dirty, or wrong viscosity" (I just changed it with synthetic 5w-40 for "normal climate" as per manual). To your timing chain is F'd (Audi A4 in particular). With somewhere in between being cam position sensors, faulty ECU, generic "wiring issues", etc.
Nothing has jumped out symptomatically to trigger me to change anything else or go digging with a multimeter. Maybe I can find some way to log the timing assuming I can make the error replicate on demand.
|11-11-2019 12:59 PM|
Also did you research Audi failures on this as I suggested?
|11-11-2019 09:39 AM|
Updating the thread here: Normally I don't just throw parts at a problem, but I found a screaming deal on some new VVT Solenoids/Valves. I replaced both intake-side valves concurrent with an oil change to make sure it wasn't just dirty oil gumming up the valve. I then drove 3 hours to Atlanta to get a spare key programmed. Everything was good until about probably an hour+ into the drive I got a 1-5 CEL. That was followed ~30 min later by the 6/10 CEL.
After the appointment (I don't think they cleared anything) I started the car to head home: no codes, but same behavior after about an hour of driving. Pulled the codes when I got home and have one 02 sensor code (P1057) and the Two VVT codes again (P1366 & 1368). Car ran fine the entire time, just for the record.
Another thing I did in the meantime was replace the positive battery terminal. Some previous owner or tech had performed improper rituals such that it would not fully tighten on the post. The only ill effect from that was the TCS needed a few yards to reset itself.
|10-25-2019 11:07 AM|
|vincep99||I had that happen once as well: I test-drove a 240Z way long ago (when they just came out) and my 67 Mustang overheated on the drive back from the dealer due to being low on coolant. No leaks, no drips anywhere, pressure-tested the system: all was fine. Never happened again.|
|10-25-2019 10:54 AM|
|10-25-2019 10:10 AM|
The truth is out there.....
Plug in an OBDII code reader and read the Freeze Frame conditions where the codes were set. Obviously they will be the same or similar, but the temps, throttle position, O2 readings etc may give you a clue.
(probably can't detect LV presence though)
|10-24-2019 11:19 PM|
'04 Gallardo VVT Valve Issue? Common? Other things to test?
My 06 car just threw the same 2 VVT CEL codes today for the 3rd time... with my wife and I driving back from the same mall each time, on that same road, in the same spot each time, after buying something at LV... each time.
Iíve driven ALONE on that same road with no new LV products inside the car at least twice.... and no CEL.
*cue the theme from The X Files*
|10-23-2019 01:43 PM|
|robgreg75||You might want to search for Audi V8s having the same valve issues since this engine is based off the audi V8s.|
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