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cylinder not working on a 96 Outback 2.5 L
Posted 08 July 2003 - 03:06 PM
The rear left cylinder, looking from the front, is not working. I replaced all 4 plugs (Not the plugs). I swapped out wires with the front left cylinder and it was still the rear left cylinder not working (Not the wires). I can see a spark from the coil on top of the engine (Not the coil). I then put some fuel injector cleaner in the gas and drove 200 miles, with no difference. I pulled the new plug out of the bad cylinder, and it was all black. I noticed that my gas mileage went up after the cylinder went out; from 22 mpg to 26 mpg (I keep track of it on every tank of gas). The generic Autozone computer read my check engine light as a cylinder 3 misfire. I listened to the fuel injector by placing a screwdriver on it and it ticked just like the other 3.
I think it may be the fuel injector or I lost compression (I need to find someone to check the compression for me).
Any ideas? Any diagnostic tips? Is it worth doing the job if it is the compression (my gut says yes)?
Posted 08 July 2003 - 04:09 PM
Posted 08 July 2003 - 05:16 PM
Do you have Spark on that perticular plug? The fact that you have 26 MPG on that motor is pretty amazing.
Posted 09 July 2003 - 08:54 AM
Guest_1 Lucky Texan_*
Posted 09 July 2003 - 09:23 AM
Curiously, and old trick to help determine compression loss due to bad rings vs. valve problems may not work on Subaru engines!
The idea is to get a compresion number - lets say its 70psi - then you would squirt/pour in a coupla teaspoons of oil - maybe even some STP - and then do another test immediately. If the number was a lot higher, approaching normal, then the oil soaked rings were sealing and it indicated bad rings. If the valve were burned/stuck open, you'd get about the same number. I don't know how this could be done with a horizontal cylinder. maybe some type of spray nozzle? maybe a tech guy will chime in.
1 Lucky Texan
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