More Dreaded Knock!!!! LONG Post

[MidnightGT]

Make sure the AC line is not hitting the header on the passenger side.. try to use a GoPro under the hood to see if you can spot anything

Will check Sonic! I have looked through everything I could think of, but I will look again. I'm not beyond checking anything at this point.

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[3beeps]

I cannot post the .csv on here through the attachments file, and I tried saving it via .pdf and posting it, but the file was too big. I will try to shrink the file to the pertintent info for .pdf and see if I can do it that way. Thanks for your help

Check out this site to share and post logs: http://www.datazap.me/ :cheers:

 

[Dennisn]

You running e85 or pump gas?

 

[MidnightGT]

Check out this site to share and post logs: http://www.datazap.me/ :cheers:

Thanks man!

You running e85 or pump gas?

E85.... technically e75ish most of the time

Here's the link to the log

http://www.datazap.me/u/cctolbert/high-knock?log=0&data=7-9-15-18&zoom=0-3604

 

[markmurfie]

looks just like the recent procharger system that had false knock. Check your belt tensioner. Check everything. things dont need to be super tight but just a little loose and they can make noise.

 

[Chummel]

Have you tried going back to 93?

 

[MidnightGT]

Have you tried going back to 93?

Yes I did. Exactly the same result....

I honestly thought it was the tune at first. So after several attempts at fixing the cause, I thought I would switch back to 93 oct to show them but had + knock again.... but before ever going e85 I never had any....

 

[ProChargerTECH]

Who did you get to turn them off? I think it is very rare to get them turned off by a tuner..

Sadly its not rare... :(
And nearly never ever should be done in any way at all.

Mine has been off in my car(TT) from day one(with tuner) but now starting to wonder after 2 engine failures if this a great idea.:frosty:

Sorry to hear of your loss (or losses)


I did a retune for a friend with a TT car, and sure as heck they were turned off by his previous tuner. :( Lucky no engine damage happened. After a retune he now has 200 more HP, and a fully functioning knock system as factor intended.

 

[Dennisn]

Sadly its not rare... :(
And nearly never ever should be done in any way at all.



Sorry to hear of your loss (or losses)


I did a retune for a friend with a TT car, and sure as heck they were turned off by his previous tuner. :( Lucky no engine damage happened. After a retune he now has 200 more HP, and a fully functioning knock system as factor intended.

In a perfect world yes you want them on. I redid everything on the car last year multiple times and could not get rid of the false knock. Verified it was false by running straight 100 race gas. I would not suggest running without knock sensors on pump gas.


It was either urn knock sensors off or remove the 9000 kit I just installed. I am not the only one who's had these issues.

 

[ProChargerTECH]

In a perfect world yes you want them on. I redid everything on the car last year multiple times and could not get rid of the false knock. Verified it was false by running straight 100 race gas. I would not suggest running without knock sensors on pump gas.


It was either urn knock sensors off or remove the 9000 kit I just installed. I am not the only one who's had these issues.

I don't doubt that every case is different.


I was just talking about the guy I quoted (with the engine failures)....and my good friends car that I redid.


For my buddy, he was told "they have to be turned off" and "it's false knock"
Well, BOTH of these turned out to be 100% untrue. With NO hardware changes at all. (The long and short of it,...the previous file had the incorrect cam schedule being commanded and was calling for WAY too much timing 80% of the time it was under moderate or heavy load)


They don't make it easy these days thats for sure.

 

[MidnightGT]

Thanks for the input.

I do agree with you Procharger Tech, however I have spent more time looking for knock than I have in total doing all modifications I have done...including S/C install, fuel, suspension, etc. So, unless I sell the car and just start over, this is my fix for now....in hopes I'll come across the source soon.

My tuner and I have come to the agreement of desensitizing my knock sensors...and I will continue the search for the source of the false knock. Hopefully I find it, but in the mean time my car is a MONSTER compared to how it has been feeling since going e85. Mostly I have been seeing 11-15* timing on my pulls. Now I am seeing 19-20*! Definitely woke my car up!

This is done with the understanding that I will listen to my car if it starts acting funny, running wrong, or anything out of the ordinary doesn't feel right...and that I have a little more knowledge than the average joe that throws a crazy tune on their car.

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