ECMlink E16G Knock Counts Logs

[TalonSpeed]

I attached my WOT run log and a cruise log. I am getting some knock and dont know why. 20psi, E16G 2.3 stroker on stock 2g Timing. 720cc injectors are running around 80% duty cycle.

Any advice?

 

[GSXftw]

I would lean towards phantom knock. It looks really odd cause its not really respondant to the timing, or lack thereof with the knock ret. Does it respond to fuel/timing adjustments? I actually had to take a degree out here and there even on the super safe 2g timing tables in the upper load cells, just because the factory never intended for them to be used and just kinda "let it ride" after 1.8

 

[gofer]

It's impossible for us to give accurate advice without a logged AFR. Honestly, I wouldn't call that PK but without a logged WB reading we're all just guessing.

http://www.dsmtuners.com/forums/ecmlink-tuning-log-file-advice/443297-please-read-before-you-ask-ecmlink-dsmlink-log-advice.html

12). Properly calibrated and configured wideband sensor

If you are trying to tune without a wideband sensor, you might as well be tuning blind. This is a critical part of a proper tuning system. This sensor is one that needs to be properly calibrated (if applicable) and configured inside your tuning software to have the logged input match what is displaying on your gauge. Please make sure both of these tasks are taken care of before you start tuning.

 

[TalonSpeed]

Wideband installed. (Innovate MTX-L) Installed in front O2 with Narrowband similation.

WOT logs show serious knock just as before with AFR starting at 11 then tapper down to 10 as revs go higher. 2.3 motor, stock 2g IM, 264 cams and E16g so there is not alot of top end flow.
I am running stock 2.0 timing. I would think with stock timing, 92 octane gas, 1 step colder NGk plugs, 18-20psi, I wouldnt get knock. The car shows knock count of 2 with the engine off, 7-12 rawknock at idle, and 100+ WOT.

I am thinking the sensor is bad. I have a new sensor I can install, but does the intake manifold have to come off?

 

[1990AWD]

You should be able to reach under the intake and remove the sensor without removing the manifold.

There isn't anything making a lot of noise in the engine bay or really bad lifter tick?

 

[TalonSpeed]

The car has 3g lifters. They are quiet. 3" exhaust with HFC so the exhaust isn't loud. The car is 200k on it. Stroker was put in 19k miles ago. I am not sure if the knock sensor was ever replaced. Previous owner kept records of everything and I do not see a knock sensor replacement ever been done to the car.

Just noticed my WB switch point should be 2.44 instead of 2.49

 

[1990AWD]

For sure check that knock sensor then. Does it have goo/slimy looking stuff on it?

 

[XiKeiyaZI]

As stated above, likely the knock sensor - always a good spot to check if your AFRs are in range. My issue with my last Talon was that it wasn't torqued properly and was, more or less, shifting around. With a quick twist of the ole' wrench I was knock-free in situations where I had been knock-happy previously.

If the mounting plate for the Manifold is still in place, it can be a pain to get to, sadly.

 

[white92talontsi]

Looks like you are too rich during spool.

 

[TalonSpeed]

I noticed the rich condition. All brackets and all emissions are still on the car. I am just going to replace sensor when I swap the JMF intake manifold on.

 

[1990AWD]

Holy crap, I just noticed just how rich you are. Yikes. I actually find I have less knock if I'm running a little leaner (11.2 vs. 11.0, 94 pump gas). Definitely change that up.

 

[Hesh724]

ya thats probly fuel knock.

 

[TalonSpeed]

I dont think it is fuel knock. I can get 50+ raw knock counts just revving the engine with no load. Knock sensor reads knock when the engine is off.

The fuel sliders only affect WOT throttle right?

 

[1990AWD]

The sliders, I'm not sure since I run speed density. It probably is a combination of fuel knock and a bad knock sensor.

Changed that knock sensor yet?

 

[TalonSpeed]

I will tackle the knock sensor and new intake manifold next weekend. It is good to see that the knock wasn't caused by a lean condition.

 

[TalonSpeed]

Replaced the knock sensor and put a rubber ring behind it, might have desensitized it too much.......will work on that later.

Installed a JMF intake manifold and 1g TB and Omni Map sensor. Idle and cruise tuning went well. But now Boost estimate is 6psi lower than what the omni sensor is reading.

Using the formula on the ecmlink wiki page I get 24% of adjustment is needed in the 1700-2100 hz range. That will make my maf comp table look real funny. Is this correct?
I also notice AFR is rich and I got 3.2 of knock retard eventhough rawknock was none.

UPDATE---------------------2013.07.30 log

I did the following:

-Changed Load Scale in DA table to 87% since I have a 2.3 engine

-Adjusted my timing tables (reduced timing at peak torque and boost spike, increased timing from 5krpm on up over stock 2g table)

-Adjusted Fuel tables targeted 11-11.3 at WOT

-Set min\max Octane Fuel and Timing Tables to very close because I believe desensitized knock sensor is triggering the ECU to believe the knock sensor is bad and pull 3.2 degrees of timing and switch to min octane maps. I come to this conclusion because timing gets pulled every time i reach the knock sensor set threshold of 50% tps and 2500rpm.

-I changed my maf comp table to what I calculated in the above post. Boost EST and my Map sensor are spot on, almost the entire pull.

Next issues to talking are removing the rubber washer behind the knock sensor and figuring out why AFR est and AFR WB are off WOT, but exactly the same during idle and cruise.