spark knock WTF ????

[astraelraen]

From what I understand to get current timing advance you would take spark advance value - the knock retard value.

So unless you have knock your timing advance would just be the spark advance value

 

[matsuda]

I think the stock knock sensor is reacting to the injectors. I removed the foam under my intake solely for looks and my car started throwing 4.5, 6.0, 7.0... usually when I would let off of the throttle while cruising. I could even rev it in neutral and make the knock sensor go off. There is no way to cause knock with no load on this motor and I only started seeing this after removing the foam. It looked better though lol...

Oh no!!!

That missing foam piece will affect the knock sensor big time!

It's better to fully understand the function of something before removing it.

 

[nypest]

From what I understand to get current timing advance you would take spark advance value - the knock retard value.

So unless you have knock your timing advance would just be the spark advance value

Right that makes sense.... I want to know what the values are in relation to. Is 7.0 even something to worry about? Or is it normal?

 

[patty AT forge]

...but if I keep the car in vac in 4th and ease it up to about 4500 rpm I get a crazy knock alert up to 5.5...... I have the stock plugs.

It may be that the ecu is far more aggressive with timing when the engine is under low load, knock being far less of an issue at that point.

 

[shaodome]

Oh no!!!

That missing foam piece will affect the knock sensor big time!

It's better to fully understand the function of something before removing it.

What piece of foam....?

 

[shadrag]

The one under the intake manifold.