After replacing the engine in a 2007 outback 2.5l. The engine starts fine warm and cold. The engine has plenty of power cold but loses power as the car warms up. I've been swapping sensors and even the throttle body, one at a time. No changes. No codes Help?
EDIT: (Additions from comments)
Replaced the EJ253 engine in my 2007 Outback with a known-good running engine from a 2006 Legacy EJ253 mated to a 4EAT. I switched the keeper on the timing belt, and added the flywheel, and mated it to a 5MT.
The engine starts fine warm and cold. The engine has plenty of power cold, but loses power as the car warms up. The power loss seems to get progressively worse the warmer the engine. No codes.
What I've tried:
- Swapping Sensors
- Throttle Body
- Knock Sensor
- New Spark Plugs and Wires
- IAT Sensor
- Dropped Exhaust Manifold