More false knock

[Darthmayxj]

I mean not that it matters anymore, but they could have been torqued too tight, and while it didn't cause excess noise for an NA setup, they were too tight for a noisy 700whp procharger setup.

Just sayin.....

They are torqued to the spec in the ford tech manual. If you knew me, you would know that I am super OCD about stuff like that.

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[205.0]

JPC T bolt kit is installed and tightened down. Attached is the new log. Max of 1* knock right after the 3-4 shift. Could this be too much timing on the initial tip in? Doesn't seem like it could be false anymore.

http://www.datazap.me/u/cbg0015/log-1505328332?log=0&data=1-28

 

[Jeff_oddo]

Here is my reply back from Lund Jr. today

 

[diablomatt]

I already pulled it off. Its sitting on a table in my garage. I'm done with boost for a while....

that sucks. :( i was hoping to help. but yes that does kinda sound like what i fixed on daves

 

[stevnoof]

My car is na but I think I have false knock issue. After hard shifts it will max out the knock sensor at +5 or +6 and stay there until I shift. I checked over the exhaust and everything looks good. I have stock headers any other places you guys think I should check?

 

[Darthmayxj]

that sucks. :( i was hoping to help. but yes that does kinda sound like what i fixed on daves

Lund showed me in the logs where I had some fueling issues too that were most likely BAP related. I haven't decided on a move forward just yet, but I may hold on to the setup and do a fuel system once funds permit and give it another try.

 

[markmurfie]

JPC T bolt kit is installed and tightened down. Attached is the new log. Max of 1* knock right after the 3-4 shift. Could this be too much timing on the initial tip in? Doesn't seem like it could be false anymore.

http://www.datazap.me/u/cbg0015/log-1505328332?log=0&data=1-28

Your LTFT shouldn't be as active as they are. I say they do apply at WOT, Lund says they do not. Ether way WOT and before WOT they are too rich. You might be able to fix your tip in knock with tip in spark reduction, but you really have a rich fuel issue. Have you flashed your stock tune then your most recent tune yet?

Transient fuel is too quick of changes for fuel trims to correct. Having excessive learned LTFT doesn't help. A quick let up and quick push down of the accelerator like during a shift is two transient conditions. The error adds up and you see it in your measured AFR not going as lean as it should to accommodate the brief low air mass area.

 

[205.0]

Your LTFT shouldn't be as active as they are. I say they do apply at WOT, Lund says they do not. Ether way WOT and before WOT they are too rich. You might be able to fix your tip in knock with tip in spark reduction, but you really have a rich fuel issue. Have you flashed your stock tune then your most recent tune yet?

Transient fuel is too quick of changes for fuel trims to correct. Having excessive learned LTFT doesn't help. A quick let up and quick push down of the accelerator like during a shift is two transient conditions. The error adds up and you see it in your measured AFR not going as lean as it should to accommodate the brief low air mass area.

I just sent the data log to lund and will see what they say. I was thinking there was a bit too much timing on the shift too because it's not pulling much if any timing. Also, can you see the spark advance on the log, because I looked and may have missed it, but cannot find it.

 

[markmurfie]

http://www.datazap.me/u/cbg0015/log-1505328332?log=0&data=1-5-28&solo=5-28

SAFTOT= spark advance final total. Click the lines to put them on their own scale based on what you have zoomed in on.

 

[205.0]

Update:

Lund says it's still definitely false but seeing how it's only 1 degree max knock after the shift, I guess that's as close as it's going to get to fixed. Throwing in the towel on this one. :shrug:

 

[markmurfie]

If they are just going to call every knock event false, why even have the knock in the logs?

 

[dubster99]

I wouldn't be too terribly worried about 0-1* after a shift for a couple hundred rpm, and then it goes back to adding timing. But lund does blame false knock a lot.

 

[205.0]

I wouldn't be too terribly worried about 0-1* after a shift for a couple hundred rpm, and then it goes back to adding timing. But lund does blame false knock a lot.

Yeah i can't feel the power dropping like I used to, and hopefully it will stay that way. Logging one more time tomorrow to see for sure. Hopefully putting it on a dyno next week too

 

[205.0]

If they are just going to call every knock event false, why even have the knock in the logs?

I just reviewed the revisions and logs I sent over to them before the final tune was given to me. The car was seeing on average 2* of knock on a good log, and it was seeing as much as 9.998 at times. Not sure why that wasn't noticed.

 

[ahl395]

So many of these cars (including mine) with false knock issues are centris. I haven't seen one PD blower false knock thread.

Anyone think the head units may be hitting/vibrating against the hood when the engine is under load and moves slightly within the motor mounts?

I've had two performance shops check my car over and find nothing. Going to check myself soon.

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