Leaderboard

yeah, if you have the carpet back, and things are reasonably quiet around you, you should hear it when you turn the key on... it does not run continuously, it runs in a short burst to prime the lines then shuts off, so what you should hear is a brief hum only for a second or so when you turn the key to on another option for testing fuel pump function is to disconnect the fuel line from the engine, and stick the end in a clear bottle, then turn the key on... you should get fuel out of the line

Oh - this was before they switched to the plastic quick-connect couplings for the fuel lines. That simplifies things. The connector: The place you get pin numbering is in the electrical schematics. At the bottom of each page they give you a picture of the connectors referenced on that page and what the pin numbers are. Also, if you figure you have the right pins, put a meter on them, power it up, and you should see your +12V. And yeah, there are some dopey colour codes. CH for brown? Did some smartypants think that CHocolate was a good mnemonic?

Subaru's, as with all (stock) modern vehicle engines that I'm aware of use "bypass" filtration. As such oil has a path around the filter - which it WILL take especially on cold start - high differential pressure across the element due to cold oil, and also will take when the filter element is plugged up due to contaminants or in this case metal. When the bypass valve opens you get un-filtered oil being fed into the lubrication system as well as the potential for debris to be washed out of the filter element as the oil must first flow past the dirty element before exiting through the bypass valve. One reason I only use WIX filters is the inclusion of the up-front bypass design that allows oil to bypass without flowing over the dirty element. It is not so much the heads that are a concern - they can generally be saved. Cams can be polished and so can the journals. But this must be done and it's generally beyond the scope of a dealer or mechanic and the heads need to get sent to a competent machine shop. The AVCS camshaft sprockets can't be cleaned as they are considered non-serviceable by Subaru. They must all be replaced with an engine failure. The bottom end probably failed after only 300 miles due to insufficient cleanliness and re-use of contaminated components from the previous engine failure. We see this all the time. GD

Yes, VINs match. Vehicle has been in our family since ~2004 (or two sets of HGs ). Plain old fixed steel cam gears on this mill, no tumble generator valves. I'm going to try some starter fluid on the intake system today.

With the age of the vehicle and/or if it’s sat around for a long time with old fuel in it the fuel pump will be cactus. It might move fuel, but it won’t pressurise it enough for the injectors to properly squirt it into the intake as a fine mist. If you just want to determine if you have voltage at the pump you could hook up a light to come on that you can watch when you turn the key. With the hatch and all the carpet removed you will probably hear the pump make noise if it’s working. It should be a constant noise, not a wavering one. How many miles on your Legacy, and does it look like someone pulled the fuel pump out previously? Be careful with any plastic tabs - electrical or fuel. I’ve read about ppl snapping a plastic fuel line into the pump but I’m not 100% sure which one this is or if it’s an internal item. Cheers Bennie

Just turn on the key. The pump will come on for a few seconds.

No. As I said the access is in the cargo area under the carpet behind the seat back.

It's a USDM 1999 with a non-AVCS EJ253 SOHC engine (build plate on strut tower confirms -253 engine). IACV may be my next target.