Congrats! Hope you are able to get some tuning done this weekend.

 

Can someone clarify this for me please, I was looking at my datalog and at one point I had a knock count of 3, at ecuload of 63% at say 2300 RPM (can't remember exactly the RPM) the timing was 19 deg.

When I looked at my timing map in ecuflash it said that at those parameters the ecu should be trying to run a timing of 20.

So the ecu pulled the 1 degree for timing to combat that knock so I should change that timing to 19 degrees on the ROM correct??

I'll have to look at the fuel map but I'm pretty sure that was at a high 13 so I don't think fuel was an issue on that log.

 

Knock should be near impossible at that timing and rpm and load. 63 load is not even close to boosting still in vacuum. I think we should review a knock voltage log and the knock to determine if this is knock or just a noisy motor.

 

whats your email?? I'll send you the log of the area I'm talking about right before I leave work that way I can log it and see what happens.

you can email me at slater5mvp@yahoo.com and I'll get it to you.

 

Regardless whether the knock was real the ecu will consider it real knock and pull the timing. As far as if iis real knock? I dont think so as RS already stated. I always log knock voltage along with knock sum to help determine real or fake.

 

I'll log that today on the way home. I've logging knock sum only.

 

Your knocking at 1500rpm..

I'm not even sure if i tried to make a car knock at 1500 rpm if i could make it do it.

What i can see is this happens very clearly anything you give it a little gas in this area. This makes me think what i'm seeing is noise. A knock voltage vs knock plot will definitely shed some more light on this.

I have to imagine something is making enough noise in your engine bay to fool the sensor its knock like exhaust rattling on something or anything really.

 

Check ur motor mounts, check your lower cross member when you undid the oil pan etc... double check all ur bolts

 

Yeah I gotta check tomorrow and see what's lose and what not. I haven't looked at the logs to see the knock voltage but I have logged it. We'll see tomorrow. The only thing I can think of is my tranny mount since its the only motor mount that looks like its on its way out but I didn't think the vibration would be that bad to cause knock and even light acceleration or a tap of the throttle.

 

Roadspike I just email you the log with knock voltage on it as well. I don't have anyone else's email but if you anybody else wants to take a look at it let me know and I'll email it. I couldn't get to attach here because it was too big.

 

Well you can post zip files here too but you'll need to keep your logs down to like 5 minutes or so.

This log really bothers me...

The knock voltage is super high but it doesn't make sense for knock on two reasons.

First the instance of knock is always proceeded by a quite time usuall 1 or 2 log entries of really low noise then BOOM huge noise and knock sum increasing. This happens on both TPS increase and decrease. This makes it seem like i'm watching your engine shift and then clank against something when it torques to the left and right.

Then there are some parts of the log where it looks really quiet but the knock sum is still flying up. Makes me think the threshold isn't high enough for the car in those cases since its clearly not rattling there but its enough to raise the knock sum.

I decided to closely inspect on of the moments you decellerated and I was surprised to see really high knock voltage levels in short bursts. Knock is ignored at such low loads so what i'm clearly seeing there is something banging around in the engine bay there just is no mistake. At that time even the fuel injectors shut off in decel mode so no firing events could have occured.

Summary:

You have two issues. One being something is rattling around in your engine bay making noise making it look like knock. Secondly your settings are too sensitive so even quite noises make it appear to be knock.

 

How many pounds of torque did you tighten your head? Did you have arp head studs at all?

 

Motor mounts? When I installed my radiator in february my mounts looked like they were going down hill. I've got a 06.

 

Did a quick inspection yesterday since I didn't have alotta time due to it being Mother's day and all.

I'm going to replace the tranny mount with the Blox front roll stopper, because it has some play on it.

The other thing I'm going to do is shave a little bit off the O2 housing because its pretty close to one of the A/C hoses but I'm not totally sure that it is hitting it.

Other than that I can't see anything that could be causing any noise or clanking around in the engine bay.

 

scrap that I'm just going to replace all the mounts to completely take them off the equation. Solid mounts here I come. People are really going to hate riding with me now.