Looking for a bit of guidance or theories before I spend more money just parts swapping.
I have a 2016 R DSG DCC @ 70k miles, Unitronic stage 1 ECU/TCU
I bought the car to fast because I loved it and wanted it. I SHOULD have checked things out more closely before buying ... but I didn't. as I've worked on it and done maintenance I have found things that I don't really like and it leads me to believe it was modded and probably abused. Was a lease that was returned and sold to me as a CPO for way too much money.
1. It was debadged and had a "Quatro" sticker over the windshield along with stickers down both rockers
2. has a vacuum tap and vacuum line run to the interior fuse panel (drivers kick panel) that was folded over and ziptied instead of properly capped off.
3. mounting points for the factory intake airbox were broken
4. resonator was removed and poorly rewelded into place
5. exhaust flap motor connectors modified/broken
6. expensive aftermarket sparkplugs
I bought the car with 38k miles, had ECU/TCU tune flashed at a shop at 40k miles. A soon as I drove 3 miles from the shop a coil connector came loose and threw a ton of codes. snapped it back in place and drove fine for a few thousand miles.
Around 44k miles I got a rough idle, hesitation under load randomly and lots of codes. I pulled the plugs and found excessive wear on the ground strap over the electrode. I took the plugs to a parts store and was quoted $275 for a set of four plugs. Went to the dealer and got a set of factory plugs and factory coils. Installed and all issues resolved.
At 62k miles I started hearing clunking from the front passenger side when I used Launch Control. As I don't often use LC I thought maybe it was just that spot of the road. I noticed under hard acceleration I would occasionally traction control flash briefly. over the next thousand or so miles I noticed TCS light up more frequently.
At 64k miles I found AWD was no longer functional and the clunking (now severe) was wheel hop. I originally thought it was a broken axle it was so violent. I changed the haldex fluid and pump three times. First was a bad pump, second didn't sound correct, third finally worked correctly and passed the learn function with similar results to good units I had seen online. This did not resolve the AWD issue.
I then bought a used rear differential from a wrecked 2016 R with a claimed 17k miles and swapped the entire rear diff, Haldex controller, swapped the functional Haldex pump from the original diff and ... no AWD.
looking at the graphs I ran through VCDS it looks like everything is normal but after .25 seconds the PMW signal to the Haldex controller spikes to 85% then goes to 0%
That brings me to this month at 70k miles. I had to drive to south florida (600ish miles round trip). On my drive back I was cruising at 80mph and the cruise kicked off, and dash board lit up with error codes. Everything from ABS and airbags to TPMS and adaptive headlights. By the time I got to a place I could pull over everything but cruise control had returned to normal. I power cycled the car and cruise control returned. a few times I have had this issue at startup now with everything but cruise going away, then after a power cycle cruise returns.
I have attached two logs I ran a few thousand miles apart ... any experts that can point me towards any ideas? Funds are tight so I don't want to keep hurling money at things. I'm currently suspecting maybe the right rear wheel speed sensor is flaky but I'd hate to dump $150 on a new sensor for no reason. When capture data from all four wheel speed sensors they all read the same in a straight line and vary slightly when cornering. maybe intermittent failure? Is there a common wiring issue or connector issue on '16 golf R's I didn't know about. Any help would be appreciated.
I have a 2016 R DSG DCC @ 70k miles, Unitronic stage 1 ECU/TCU
I bought the car to fast because I loved it and wanted it. I SHOULD have checked things out more closely before buying ... but I didn't. as I've worked on it and done maintenance I have found things that I don't really like and it leads me to believe it was modded and probably abused. Was a lease that was returned and sold to me as a CPO for way too much money.
1. It was debadged and had a "Quatro" sticker over the windshield along with stickers down both rockers
2. has a vacuum tap and vacuum line run to the interior fuse panel (drivers kick panel) that was folded over and ziptied instead of properly capped off.
3. mounting points for the factory intake airbox were broken
4. resonator was removed and poorly rewelded into place
5. exhaust flap motor connectors modified/broken
6. expensive aftermarket sparkplugs
I bought the car with 38k miles, had ECU/TCU tune flashed at a shop at 40k miles. A soon as I drove 3 miles from the shop a coil connector came loose and threw a ton of codes. snapped it back in place and drove fine for a few thousand miles.
Around 44k miles I got a rough idle, hesitation under load randomly and lots of codes. I pulled the plugs and found excessive wear on the ground strap over the electrode. I took the plugs to a parts store and was quoted $275 for a set of four plugs. Went to the dealer and got a set of factory plugs and factory coils. Installed and all issues resolved.
At 62k miles I started hearing clunking from the front passenger side when I used Launch Control. As I don't often use LC I thought maybe it was just that spot of the road. I noticed under hard acceleration I would occasionally traction control flash briefly. over the next thousand or so miles I noticed TCS light up more frequently.
At 64k miles I found AWD was no longer functional and the clunking (now severe) was wheel hop. I originally thought it was a broken axle it was so violent. I changed the haldex fluid and pump three times. First was a bad pump, second didn't sound correct, third finally worked correctly and passed the learn function with similar results to good units I had seen online. This did not resolve the AWD issue.
I then bought a used rear differential from a wrecked 2016 R with a claimed 17k miles and swapped the entire rear diff, Haldex controller, swapped the functional Haldex pump from the original diff and ... no AWD.
looking at the graphs I ran through VCDS it looks like everything is normal but after .25 seconds the PMW signal to the Haldex controller spikes to 85% then goes to 0%
That brings me to this month at 70k miles. I had to drive to south florida (600ish miles round trip). On my drive back I was cruising at 80mph and the cruise kicked off, and dash board lit up with error codes. Everything from ABS and airbags to TPMS and adaptive headlights. By the time I got to a place I could pull over everything but cruise control had returned to normal. I power cycled the car and cruise control returned. a few times I have had this issue at startup now with everything but cruise going away, then after a power cycle cruise returns.
I have attached two logs I ran a few thousand miles apart ... any experts that can point me towards any ideas? Funds are tight so I don't want to keep hurling money at things. I'm currently suspecting maybe the right rear wheel speed sensor is flaky but I'd hate to dump $150 on a new sensor for no reason. When capture data from all four wheel speed sensors they all read the same in a straight line and vary slightly when cornering. maybe intermittent failure? Is there a common wiring issue or connector issue on '16 golf R's I didn't know about. Any help would be appreciated.