The Throttle Postion Sensor passes, reading.5 volts at closed throttle and about 4.5 at full open throttle. The enginge will rev up to 5000 rpms in neutral no problem. Under a load is when the situation gets funny. I drove around yesterday to try to throw an error code and got nothing. There is a clanky sound coming from the engine area when the car is slowing down or going downhill. It leads me to believe that there is perhaps an exhaust valve leak in the cylinder with low compression. The Subaru manual calls for 155 to 185 psi with no more than 5-10 psi between any cylinders. The haynes says 145 to 180 with no description on variances. Perhaps a crack that isn't big enough to backfire, but big enough to mess with compression ratios. No coolant in the oil and no oil in the coolant, so I doubt its the head gasket.
Also the ignition coil measures infinte resistance for its primary resistance check between terminals 1 and 2 and 2 and 4. The manual calls for around.6 ohms. Wouldn't it just not fire if this ignition coil did not have its ignitors built integrally to the coils. Some Subaru's don't have a primary resistance test for this reason, however I can't get confirmation as to whether the Subaru 2000 Legacy Outback Limited edition falls into the first or second category.
No repair jobs prior to it happening. It did need a CV joint replaced(front passenger side) which I did after this happened, along with a new fuel float level gauge(gas gauge was reading funny levels as it approached empty, now it reads well), oxygen sensor(which helped somewhat, now the problem is not as extreme but still there enough to be problematic going above speeds of 30-35 MPH) a valve lash adjustment(helped as well a little), and I did a vacuum test on the intake manifold which reads fine( a steady 22 inches with a drop to zero than around 25 back to 22 on a quick acceleration and drop to idle) but the compression check variation of 25 psi on the one cylinder has me wondering about an exhaust leak. All repairs were done after the car lost power. Only the O2 sensor and valve adjustment provided any noticeable improvements.
At this point I'm ready to pop off the intake manifold and look at some valves. Can you say valve job?
Any thoughts or ideas confirming or redirecting would be greatly appreciated.
Sunday, August 17th, 2008 AT 9:00 AM