Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

knock sensor q's


  • Please log in to reply
11 replies to this topic

#1 oddcomp

oddcomp

    Subaru Master

  • Members
  • 1,763 posts
  • longview ,wa

Posted 10 February 2005 - 11:14 PM

anyone have a idea what size of thread the stock ea82t knocksensor is?? i need to pull mine and put a plug in its place

#2 MilesFox

MilesFox

    Catch this Fox!

  • Members
  • 10,611 posts
  • Madison/Milwaukee, WI

Posted 11 February 2005 - 01:07 AM

why a plug? the knock sensor fits into a boss on the engine casting, there is nothing in the hole to plug. even NA blocks have the same boss

#3 oddcomp

oddcomp

    Subaru Master

  • Members
  • 1,763 posts
  • longview ,wa

Posted 11 February 2005 - 01:30 AM

ahh well see having never pulled one out its allnews to me :)
i don't need mine anymore and someone else does

#4 grossgary

grossgary

    Elite Master of the Subaru

  • Members
  • 20,084 posts
  • WV

Posted 11 February 2005 - 01:41 AM

i know you're running MS, how does that deal with knock?

speaking of MS - if you drive up in the mountains or different times of year/climate do the maps or variables need to be changed or will the car run fine? MAF should take care of that right? *hijack finishedd*

#5 NorthWet

NorthWet

    Eeyore Incarnate

  • Members
  • 5,039 posts
  • Bremerton, WA

Posted 11 February 2005 - 01:58 AM

Clayton, Miles is right about it being a blind boss.

GG, IIRC MS (too many initials!!!) uses MAP and doesn't need MAF. Either way, I am pretty sure that it compensates. And he is probably using the SAAB APC's knock sensor, which explains not needing the Sube one. i think that MS can utilize a knock sensor, but no real need unless it is "&EDIS" or similar. I think that the APC system is superior to system that just retards spark.

oddcomp can let you know if I am full of s... er, wrong answers. :grin:

#6 oddcomp

oddcomp

    Subaru Master

  • Members
  • 1,763 posts
  • longview ,wa

Posted 11 February 2005 - 01:26 PM

as far as the altitude change goes
everytime you go to start your car teh ms grabs a baselne atmospheric reading from the map sensor takes like all of .5 seconds if that even
and then uses that baseline atmo reading to calculate teh fuel in regards to air density /air temp

i forgot what all mr wet said but yeah i use the apc for boost control and knock sensing err i will when i get everything backtogether finally <turning wrenches again on the beastie started yesterday > and teh apc also has a knock indicator light output wich in turn can e fed into the ms box
and if your using ms to run ignition like dis in my case but it can also run other electronic controlled distributors also that have electronic dwell and advance /retard

oops i drifted anyways take the apc knock indicator tie it into teh ms knock input and play with the programming and it will also retard timing
for example it gets knock signal so it pulls timming back for say 1 degree
if after oh 1-2 seconds or so it does not get a knock signal again it puts the timming back
now if it hears the signal again in that 1-2 second span it will pull out another degree


btw i don't care if ya hijack

#7 Ross

Ross

    Can't be bothered

  • Members
  • 1,865 posts
  • Christchurch, New Zealand

Posted 11 February 2005 - 08:17 PM

anyone have a idea what size of thread the stock ea82t knocksensor is?? i need to pull mine and put a plug in its place


AGGGHHHH! is it a reverse thread?? I just sheared teh top off mine trying to take it out to clean the contacts!!!! Now i have to figure out a way to get the rest of it out...:banghead:
Any suggestions would be appreciated!

#8 Ross

Ross

    Can't be bothered

  • Members
  • 1,865 posts
  • Christchurch, New Zealand

Posted 11 February 2005 - 08:45 PM

Tight as heck sure is right. Prob is that now i have a small stud stiking out of he block with no hex on it! Can't get vise-grips on it properly without taking the intake manifold off, and i really can't be bothered with that!!
Add to that that i just found the cheapest i can get a new knock sensor is NZ$250, and it leaves me very angry!!!:mad:

Does anyone know how often the knock sensor unit has to retard the timing? (is it a regular occurence, or just when something is going wrong?) If its not often, then would it be ok to leave the knock sensor wires connected with the sensor off the engine untill i get a new one?

#9 oddcomp

oddcomp

    Subaru Master

  • Members
  • 1,763 posts
  • longview ,wa

Posted 11 February 2005 - 11:49 PM

it only retards timing when it hears "ping" like from bad gas or overadvanced timing to much boost if its turbo charged
what you could do at least for now is to retard the timing a degree or 2 as a failsafe and run it until you can replace it
just a idea

#10 Ross

Ross

    Can't be bothered

  • Members
  • 1,865 posts
  • Christchurch, New Zealand

Posted 12 February 2005 - 12:23 AM

Yeah thanks, ill probably do that untill monday, ill see how it goes!

#11 Ross

Ross

    Can't be bothered

  • Members
  • 1,865 posts
  • Christchurch, New Zealand

Posted 13 February 2005 - 11:57 PM

Does anyone know if the ea81t knock sensors are the same as the ea82t ones?
Went to a junk yard, and the ea82t one looked quite different, although it may just be a different connection on top?

#12 naru

naru

    1000+ Super USER!

  • Members
  • 1,828 posts
  • under the bridge

Posted 14 February 2005 - 01:57 AM

Does anyone know if the ea81t knock sensors are the same as the ea82t ones?
Went to a junk yard, and the ea82t one looked quite different, although it may just be a different connection on top?


Nope,different.Might work though.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users