Hello Subaru folks,
first time posting here, please be gentle with me!
I've got - what we'll call for now - an '02 Outback with about 40,000 miles on the clock. Plugs recently replaced, new s-belt and idlers and tensioner, fitted with a K&N Apollo intake system, and ceramic coated headers into a high-flow CAT and muffler.
It's been in the vehicle and running for about 1,000 trouble-free miles, but suddenly has developed a *very* subtle rough running / vibration issue.
At idle I can ever-so-slightly perceive a bit more vibration than previously, and at highway speed I can feel it as an ever-so-subtle low harmonic... even my rear-view mirror is vibrating a bit from it.
I have no CEL, OBDII tests through the Torque Android app come back clean. No change in available power that I can perceive.
No odd noises, no leaks, etc that I can detect.
I know it's the engine and not suspension/wheels because I can de-clutch and the vibration goes away. Also I can feel it very subtly at idle.
I've checked all fasteners, mounts, etc to rule out something just being loose.
In my old-school carburetor mind I would take a wild guess of a dead cylinder, but this is not indicated in the OBD tests as I stated above.
If anyone has any ideas or tips with where to start and what to check (either physically or with Torque/OBD) let me know!!!
now, here's the kicker... this engine is actually in a 1987 Volkswagen Vanagon Syncro... but the entire engine and wire harness and ECU and all are just as they were in the original Outback...
first time posting here, please be gentle with me!
I've got - what we'll call for now - an '02 Outback with about 40,000 miles on the clock. Plugs recently replaced, new s-belt and idlers and tensioner, fitted with a K&N Apollo intake system, and ceramic coated headers into a high-flow CAT and muffler.
It's been in the vehicle and running for about 1,000 trouble-free miles, but suddenly has developed a *very* subtle rough running / vibration issue.
At idle I can ever-so-slightly perceive a bit more vibration than previously, and at highway speed I can feel it as an ever-so-subtle low harmonic... even my rear-view mirror is vibrating a bit from it.
I have no CEL, OBDII tests through the Torque Android app come back clean. No change in available power that I can perceive.
No odd noises, no leaks, etc that I can detect.
I know it's the engine and not suspension/wheels because I can de-clutch and the vibration goes away. Also I can feel it very subtly at idle.
I've checked all fasteners, mounts, etc to rule out something just being loose.
In my old-school carburetor mind I would take a wild guess of a dead cylinder, but this is not indicated in the OBD tests as I stated above.
If anyone has any ideas or tips with where to start and what to check (either physically or with Torque/OBD) let me know!!!
now, here's the kicker... this engine is actually in a 1987 Volkswagen Vanagon Syncro... but the entire engine and wire harness and ECU and all are just as they were in the original Outback...