Knock at highway speeds

[Meshuggah]

I'm getting knock while cruising at highway speeds and I have no idea why.

Happens about 3300 rpms and 65-70MPH

Anyone see something off in the log?

 

[Calan]

It's phantom knock (also called PK).

Well known problem and tons of info on it.

 

[Meshuggah]

During this log I didn't hear anything but earlier in the day while on the highway I could hear preigntion or knock at the same speeds.

 

[Calan]

Ok...just looked at your log and that's crazy knock that could be real.

Why are your fuel and timing sliders still not zeroed? (And your MAFComp table still looks strange).

 

[Meshuggah]

Ok...just looked at your log and that's crazy knock that could be real.

Why are your fuel and timing sliders still not zeroed? (And your MAFComp table still looks strange).

What difference does the fuel and timing sliders make if this is happening in closed loop?

How does the MAFComp table look strange? I set the MAF Hz at idle to get .25AirFlowPerRev then did a cruise log to use the table that the MAF compensation gave me. Whats it supposed to look like?

 

[Meshuggah]

My fuel and timing curves are zero now.

Can you elaborate on what you mean when you say my MAFComp table looks weird?
It idles around 550Hz, so I adjusted that slider to get .25AirFlowPerRev. Set the Open Loop perimeters higher and took a 10-15 min cruise log. Then with that log I ran MAFComp adjust.

What more am I supposed to do?

I'm still getting large counts of knock at crusing around 3k

Here's what I'm working with now.. I cleaned up the MAFComp table and fuel and timing sliders are zeroed.

Knock doesn't seem to be as bad so maybe it is PK?