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Thread: Symptoms of fuel pump O-ring problem? Reply to Thread
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  Topic Review (Newest First)
11-29-2016 01:32 AM
1 Lucky Texan what is the code again? should be P followed by 4 numbers (like P0420)

if there is a cracked tab on the metal cap - you will need to order that too.
11-28-2016 04:46 PM
Rico Rivaldi hello everybody!! im new to the forum and to subarus. I have this 00 legacy that has the rought start issue, it only starts right up when i prime the fuel pump a few times, my old fuel pump died, and i have replaced the fuel filter. Im sure this has to do with the infamous o ring, i just order the pk from Amazon, my question is....Did you guys get the P040 code when the oring was bad??

I have been struggling with this code, I cant pass emissions, and I wonder if these 2 issues are related.

Thanks
09-29-2016 10:06 PM
angler228
Quote:
Originally Posted by 1 Lucky Texan View Post
way back when I was investigating this - I actually traded an 'english' measurement with someone who had metric 928's - we decided the metric was a better fit so - I can't 'honestly' say anyone 'knows' what the stock OEM o-ring is.

but you can buy them in packs of 10 from Amazon and probably other places like; zoro, msc, grainger etc.


https://www.amazon.com/Sur-Seal-OR75...ton+75D+o-ring


maybe contact this guy (I have no connection with him, just found it with a general search); http://www.subaruoutback.org/forums/...available.html
Hey, thanks for the link. I got in touch with the guy with the extra O-rings Monday. I received it Thursday in the mail. Quick, painless, and cheap. What more is there?
08-02-2016 11:56 PM
spoonfork For the record, I've had the the "O-Ring" issue on my 2000 outback 4 Cyclinder engine.

See my post.
http://www.subaruoutback.org/forums/...0-outback.html
07-27-2016 02:42 PM
Sherpaman thank you very much kind sir
07-27-2016 02:40 PM
Sherpaman thank you very much kind sir.
07-27-2016 01:56 PM
1 Lucky Texan way back when I was investigating this - I actually traded an 'english' measurement with someone who had metric 928's - we decided the metric was a better fit so - I can't 'honestly' say anyone 'knows' what the stock OEM o-ring is.

but you can buy them in packs of 10 from Amazon and probably other places like; zoro, msc, grainger etc.


https://www.amazon.com/Sur-Seal-OR75...ton+75D+o-ring


maybe contact this guy (I have no connection with him, just found it with a general search); http://www.subaruoutback.org/forums/...available.html
07-27-2016 01:16 PM
Sherpaman If someone can tell me exactly where to get the o-ring it would help me a great deal, I have looked on line with every number in this thread, called my subi dealer, NAPA.


where are you getting this #928 viton o-ring ?




thanks
07-21-2016 03:45 PM
Sherpaman Could someone post a link to the correct o-ring, I can not get a final answer that i feel good about ordering.




thanks so much


Sherpaman
05-01-2016 05:33 PM
johnny_k All is well with our Subaru, much thanks to you guys. Time to report back my findings and results, as a thank you and in case any other run into similar problems and dig up this thread.

Quote:
Originally Posted by 1 Lucky Texan View Post
yeah - might have wrinkled/doubled back on itself

um - did you SEE any problems with the original? cracked tabs or displaced/ruptured o-ring sticking out?
Bingo, that was the problem. And yes, maybe I forgot to mention, but the original had the typical popped/displaced o-ring and ruptured tab when I first removed the assembly.

Sure enough, I pulled the assembly (a third time!) and opened the cap, and the o-ring and slipped out of place because of how I had put it on. I placed it around the cup instead like is done in the video, put it all back together and that solved it - it started right up on the first try.

What surprised me the most is that the fellow who posted the video to youtube said that he had ran his car without an o-ring for a week and it worked fine, just needed a couple tries starting every time. I was surprised that just with a little kink in the o-ring ours would not start at all, but then again he had put in a brand new pump, where we were using two older pumps (the one we originally had on, with 150k on it, and the one from the junkyard with 100k on it).

The OB is back up and running very well, probably from the combo of the new fuel pump o-ring & cap, and a clean IAC valve and IAC body. The clean throttle body looks nice, but it's so big that I don't think cleaning a tiny bit of carbon off that really makes a big difference on performance. Thanks again all!
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