J A Blazer Posted October 22, 2007 Share Posted October 22, 2007 2000 OBW 108K. My CEL has been intermittently coming on, so I had my mechanic pull the code today, with the CEL on. Result: "P0328 knock sens 1 high input." What does this mean? Has the knock sensor gone bad, or is it telling me something else? I had replaced the knock sensor about 10K ago, with an OEM one from the dealer, so I would be surprised if it had failed so soon. Is it possible I damaged it during installation? TIA. Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 22, 2007 Share Posted October 22, 2007 check the torque on it first and check the connector making sure it's seated and not corroded or dirty. then remove and check it, looking for cracks. then reinstall at the proper torque making sure the threads are clean (they should be). did you use a Subaru knock sensor? Quote Link to comment Share on other sites More sharing options...
J A Blazer Posted October 22, 2007 Author Share Posted October 22, 2007 Yes, it was a Subaru knock sensor. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted October 22, 2007 Share Posted October 22, 2007 ^^ ditto, check the connector, mating surface to the block for cleanliness/corrosion, and mounting bolt torque for looseness. If it was overtorqued the new sensor may have cracked. Anyway I replaced mine on '00obw with a resistor instead. Quote Link to comment Share on other sites More sharing options...
J A Blazer Posted October 22, 2007 Author Share Posted October 22, 2007 What is the recommended torque for the knock sensor? Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 22, 2007 Share Posted October 22, 2007 What is the recommended torque for the knock sensor? 17.4 +/- 2.1 ft*lb(f) up above is a gray line and you'll see a "search" button. this information is available with the click of a button on demand. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted October 22, 2007 Share Posted October 22, 2007 Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 22, 2007 Share Posted October 22, 2007 wow, different torque spec's - i pulled that 17 lb number from one of your old posts porcupine, are there different numbers for different engines?? Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 22, 2007 Share Posted October 22, 2007 here's the link: http://www.ultimatesubaru.org/forum/showthread.php?t=76403&page=2&highlight=knock+sensor+torque Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted October 22, 2007 Share Posted October 22, 2007 They're nearly the same; probably just a conversion/rounding difference since soob seems to always list the main value in Newton-meters and then conversions to kilogram-meters and foot-pounds(force). For '96 2.2L and 2.5L alldata says 17.3 ft-lb(f) +/- 2.1 ft-lb(f). For '00 2.5L alldata says 17.4 ft-lb(f) +/- 2.2 ft-lb(f). Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 22, 2007 Share Posted October 22, 2007 dorkus, i looked at the N-m number. as an engineer, you'd think i could at least read numbers!? Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted October 22, 2007 Share Posted October 22, 2007 hehe isn't that what caused that Mars explorer probe to crash about 10 years ago? Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 22, 2007 Share Posted October 22, 2007 hehe isn't that what caused that Mars explorer probe to crash about 10 years ago?ah, nice call. Quote Link to comment Share on other sites More sharing options...
Rooster2 Posted October 23, 2007 Share Posted October 23, 2007 It is possible that you over tightened the bolt, which results in cracking the knock sensor unit. When I installed a knock sensor on my 98 OBW, I couldn't figure out any way to tighten the bolt using a torque wrench, as I used a wobbler that kept wanting to slip off the bolt head. I just snugged the bolt up tight, but not super tight, and called the job done. I haven't had any trouble since. Quote Link to comment Share on other sites More sharing options...
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