August 7, 201015 yr When doing a compression test, what's the best way to disable the spfi? Which connectors are the right ones to disconnect and where are they located? (The only thing I know about cars I've learned from this site while torturing my loyale. My taxonomy is lacking :-\) Keeping Your Subaru Alive mentions TWO connectors located in front of the throttle body but I'm only seeing one - which I think is called the Throttle Sensor Electrical Harness (4 linear prongs). Chiltons says to disconnect the cold start valve and ALL injector connections. (Cant find a picture that tells me where the cold start valve is) Haynes doesn't even mention fuel injection, only disconnecting the high tension wire of the coil. (Thanks for letting people destroy their engines haynes) Seems like a really simple test, if I knew the names of the parts I'm looking at The only way to learn is to just jump in and do it, so any guidance ya'll can offer is greatly appreciated.
August 7, 201015 yr Just slide under the car and unplug the fuel pump. Much easier and won't throw any codes. Start the engine and run till it stops. Then to disable the spark pull the connector off the ignitor (the two-pin one on the coil bracket). Pull all 4 plugs. Then do your comp. check with the throttle held wide open. GD
August 7, 201015 yr Pull the Distributor connector. No CAS signal = no spark or fuel Then pull all plugs, and hold throttle open.
August 17, 201015 yr Author Thanks guys. Finally got a chance to do the test and things aren't looking to bad. All cylinders topped out at around 7 turns, cylinder 1 at 190 and the other 3 200. From what I'm reading, that means I may have some worn rings but the oil puking elsewhere. ... onward to more testing! I'm guessing it's the oil pump, but I wanted to make sure the engine was worth a poo before I started throwing more time and money at the lil' beasty. Not looking foward to the timing covers, especially with the bolts spinning in place. Not sure how I'm going to attack that. :-\ (got some front end issues as well - bad hub)
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