2G No Power. Rough Idle. Tach Wrong. Lean

[Chuck98TSI]

Today while driving the car had no power to accelerate. I went from 5th to 3rd and at 50mph the rpm were 1200 According to tach. Impossible.

Came to a stop, car sounds like it wants to stall. Rpm gauge between 0 and 100. Ecmlink reporting 900 rpm. Feels more like 500. AF at idle is unreadable (lean). Car sound awful.

I limped her home, but twice on way home, she bucked and power was restored until I put more than cruising load on engine.

No boost leaks, spark plugs and wires good. 13.7 volts seen at ecu. Thoughts?! Thanks

 

[Justin Lauscher]

ECU taking a dump maybe?

 

[Pacey]

Could it be your CAS? Not sure if they cam vibrate lose or just fail for that matter. Maybe somebody else with more experience can chime in.

 

[Chuck98TSI]

Trying to not start there but it has crossed my mind. Seeing it's winter and she will be going into storage, may be worth sending to ecmlink for testing / repair.

CAS does have a leak and there is oil underneath. Was like that since I bought it. Should replace anyway.

 

[Pacey]

I didnt think the CAS could leak. The CAS in my car is just a bar (that is a terrible description on my part btw) that fits into the end of the camshaft. I always assumed the camshaft was sealed at the CAS preventiong oil from seeping out. Have you noticed any odd smells inside the cabin. When the capacitators leak inside the ecu, you will get a terrible fishy smell although you might not notice until you crack open the case.

 

[Chuck98TSI]

Just an update. It was the PTU. Replaced and all was good in the world (minus some stalling issues when rolling to a stop)