Knock sensor less for 2 years.Where does it go?

[fulanititoo8198]

I just found out I haven't had a knock sensor since I bought the car 2 years ago. I've been looking at pictures trying to figure out which hole the knock sensor goes in. So far I can only find pictures of 6 bolt blocks which have the knock sensor a little bit above the 2nd freeze plug from the timing side. BUT my 7bolt has a a hole right below the 2nd freeze plug. Anyways can anyone find a picture of a 2g 7 bolt block with a knock sensor in it or confirm that it is on the 2nd freeze plug from the timing.

Thanks,
Christian

1st picture is a 6bolt the bottom is a 7bolt. See how the hole is on the lower part of the freeze plug unlike the 6 bolt? Does it still go there?

 

[Defiant]

That's the correct place, but in truth it'll work fine just about anywhere on the block so long as it has a good, secure mounting.

 

[fulanititoo8198]

Ok, thanks a lot

 

[LA97GST]

And hasnt been running rich and bogging the last 2 years?

 

[daren_p]

And hasnt been running rich and bogging the last 2 years?

Why would it be running rich or bogging, were talkina bout a knock sensor not an O2. Car probably ran great as timing would have never been pulled due to knock. Ever heard the old saying car was pulling better then ever, just before it blew up (ie running to lean). Good to hear nothing major happened without the knock sensor as it very easily could have.

 

[selmerguy]

My car is a 1g but if I unplug the knock sensor I get 9 counts of knock whenever I touch the throttle. Is it the same for 2g's?

 

[LA97GST]

The ecu pulls timing and add's fuel when there is no knock sensor detected.

 

[fulanititoo8198]

The knock sensor is making a big difference I've still got some tuning to do with link but it's pulling bad Ash! I feel retarded not having a knock sensor for 2 years I just never started messing or fixing anything until now.

 

[daren_p]

The ecu pulls timing and add's fuel when there is no knock sensor detected.

Hmmm, with no knock sensor is this constant or is it random because of a floating ground? Adds fuel when there is no knock sensor, is that correct? Under normal operation the ecu would reduce timing & then lower boost via bcs if knock is sensed, not add fuel?

 

[LA97GST]

This is information GVR4 passed on to me. Here is my ideas.

The ecu has no knock sensor so it can not "see" detonation correct? If it can not see detonation it wants to prevent it even if there is none. It goes into a safe mode pulling timing to lower cylinder pressure and reduce detonation caused by unburnt fuel mixture. It also dumps fuel into the cylinder to furthur reduce detonation and even better pre-detonation. These conditions can be caused by a lean mixture. I by no means an expert but my many Corkey Bell books taught me this so far.

 

[hereitcomes]

You can get a bracket that mounts to the underside of your intake manifold. They are the same for 1g 6 and 7 bolts. The bracket holes the wires for the knock sensor and also various vaccum lines.

 

[andymoraitis]

This is information GVR4 passed on to me. Here is my ideas.

The ecu has no knock sensor so it can not "see" detonation correct? If it can not see detonation it wants to prevent it even if there is none. It goes into a safe mode pulling timing to lower cylinder pressure and reduce detonation caused by unburnt fuel mixture. It also dumps fuel into the cylinder to furthur reduce detonation and even better pre-detonation. These conditions can be caused by a lean mixture. I by no means an expert but my many Corkey Bell books taught me this so far.

Exactly. It's very similar to limp mode and the motor will have limited power.

 

[BISHILVR]

The 2g has a "passive" knock sensor, it in my experience has no way to check for it being unplugged, I have never seen a 2g throw a code for an unplugged knock sensor. It just adjusts timing as if there were no knock. On a 1g the sensor works differently, it actually works like a microphone and has a coil of wire in it and thus a resistance and the ecu can check for it being unplugged and if it is it will go into limp mode and run like crap. On a 2g you wont even notice it unplugged at all.

 

[LA97GST]

Well there we go.... stupid 2g's hehe

 

[fulanititoo8198]

The 2g has a "passive" knock sensor, it in my experience has no way to check for it being unplugged, I have never seen a 2g throw a code for an unplugged knock sensor. It just adjusts timing as if there were no knock. On a 1g the sensor works differently, it actually works like a microphone and has a coil of wire in it and thus a resistance and the ecu can check for it being unplugged and if it is it will go into limp mode and run like crap. On a 2g you wont even notice it unplugged at all.

My car has actually thrown a code a few times thats what made me curious as to why. It came and went.

 

[BISHILVR]

I've not seen one throw a code for it. Myself and a buddy of mine have ours unplugged and you could'nt pay ours to throw a code for it, wont happen and I have a 95 eprom ecu, he does'nt, so not sure what your case is.