Knock Retard - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Gordy87 · 06-01-2019, 09:42 AM

Looking for some help please. My car just started pulling large amounts of timing. On my SCT X4 I'm seeing upwards in excess of 12-15* of knock. It is mainly in 1st - 4th gear, on slightly moderate take off (nothing over 3500rpm). Remains until I fully release off throttle, and then only drops at a slow pace. This just started 2 dsys ago, and I have already inspected plugs, cleaned MAF, checked for leaks (nothing has been removed from the car prior to this starting).

Mods CAI, LTH, Full SS exhaust and tune. Just looking for some guidance as to some other things to check before I drive 1hr+ to a good shop. Would O2's cause this?

Tried to add short video, but wouldnt upload. Heres a screenshot from the video.

chevy pilot · 06-02-2019, 02:57 AM

I too have seen the same,max.10-12* of knock.
5-6* of knock is my "normal".
I'm also cleaned MAF.I have also made BG Fuel/Air Induction service,they didn't help.

ChibiBlackSheep · 06-03-2019, 08:25 AM

Dumb question, you are running 93 octane correct?

Has the weather drastically changed?

Gordy87 · 06-03-2019, 04:01 PM

Quote:

Originally Posted by ChibiBlackSheep

Dumb question, you are running 93 octane correct?

Has the weather drastically changed?

Yes sir, always run 93. And occasionally will run an octane booster in it about every 2-3 months just b/c it makes me feel better. Weather has been big change here in GA (of course). We been in the mid 90's for last couple weeks.

Overflow · 06-03-2019, 05:49 PM

And here I am worrying about my 4* of KR...

Gordy87 · 06-03-2019, 09:35 PM

Quote:

Originally Posted by Overflow

And here I am worrying about my 4* of KR...

Overflow, I would kill for 4* right now. This thing came out of nowhere. Showing out for a buddy, and bammmmmmmm Flat on her face. Then from that moment on, that reading from 1st gear start w/ just moderate driving. Seen it hit as high as 20* at one point.

Gordy87 · 06-03-2019, 09:44 PM

I'm hoping I found the issue. When I was inspecting everything I have read on here, or that I could think of, I ran across this. Must have overlooked it at least 4 times, and never even would have thought, if I wasnt trying to unplug my passenger O2 wire for inspection (which is also burnt, by the way). Got the wires repaired tonight, and will repair O2 extension tomorrow, followed up with kevlar heat wrap and a nice extra ground from back of the block to chassis for the start issues ( I have been ignoring). I will update once I find out if this corrects the issue. Hopefully the damage isnt done and traveled elsewhere in the electrical circuit.

CamaroFred · 06-03-2019, 11:44 PM

I wonder if a motor mount may have caused the contact.

Gordy87 · 06-04-2019, 07:38 PM

Quote:

Originally Posted by CamaroFred

I wonder if a motor mount may have caused the contact.

Havent noticed any bumping or anything that would be associated with a broke mount.

Gordy87 · 06-04-2019, 07:43 PM

Needless to say, I got all the wiring repaired, or so I thought. After getting everything back in position and reinstalling fuel line, went to start it for a test run, and nothing, absolutely zip. Battery read only 4v, so after I had hooked battery back and before I had put fuel line on, the battery drained down completely. Back to the drawing board. Will take any advice you guys have, once again.

chevy pilot · 06-06-2019, 09:03 AM

Quote:

Originally Posted by Gordy87

I'm hoping I found the issue.

Wire damage.
I run also 93.
5-6* of knock is the minimum i can hear.

Gordy87 · 06-06-2019, 05:26 PM

Just to put some closure to the thread here.

After charging the battery overnight on a trickle charger, I was expecting to throw it back in and let it sit so I could see if it drained back down. So after hooking the battery up to start the agony of what I thought was going to be a painstakingly difficult time of tracking down a short causing a slow drain down of the battery, I found the problem almost immediately. I have attached a picture of my findings.

Gordy87 · 06-06-2019, 05:32 PM

Apparently these 2 were working on every knob and button on the inside, while I was working on the outside, and after getting all the wiring repaired, as it was pretty late, I just hooked battery back up, and didnt even notice the flashers being on since I didn't attempt to start the car. It's pretty loud, as one of the guys that works for me that lives about 1/8th mile from me states, that he knows when its time to go to work when he hears my car start up in the mornings. So now I feel pretty dumb kinda, but glad it wasnt worse.

camguynj · 06-07-2019, 08:50 AM

Ha Ha! Adorable kids. What's the KR readings now?

06-01-2019, 09:42 AM	#1
Gordy87 Drives: 2010 Camaro SS Join Date: Oct 2016 Location: Georgia Posts: 300 View My Garage	Knock Retard Looking for some help please. My car just started pulling large amounts of timing. On my SCT X4 I'm seeing upwards in excess of 12-15* of knock. It is mainly in 1st - 4th gear, on slightly moderate take off (nothing over 3500rpm). Remains until I fully release off throttle, and then only drops at a slow pace. This just started 2 dsys ago, and I have already inspected plugs, cleaned MAF, checked for leaks (nothing has been removed from the car prior to this starting). Mods CAI, LTH, Full SS exhaust and tune. Just looking for some guidance as to some other things to check before I drive 1hr+ to a good shop. Would O2's cause this? Tried to add short video, but wouldnt upload. Heres a screenshot from the video. Attached Images Last edited by Gordy87; 06-01-2019 at 01:27 PM. Reason: Video

06-03-2019, 08:25 AM	#3
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,084	Dumb question, you are running 93 octane correct? Has the weather drastically changed? __________________ LS3 Crate Engine Swap \| CSP Custom Cam 232/240 .615/.615 113 +3 \| Stainless Power LT Headers \| Z28 Intake \| Borla S-Type Exhaust \| FTI Triple-Disc Billet 3200 Stall 2012 Camaro 2SS/RS \| 1968 Camaro SS \| 2020 Cadillac CT5 Premium Luxury \| 2021 Spark LS

06-03-2019, 05:49 PM	#5
Overflow Space Shuttle Aficionado Drives: 2016 Camaro 2SS Join Date: Jun 2010 Location: Tampa, FL Posts: 30,899 View My Garage	And here I am worrying about my 4* of KR... __________________

06-03-2019, 09:44 PM	#7
Gordy87 Drives: 2010 Camaro SS Join Date: Oct 2016 Location: Georgia Posts: 300 View My Garage	I'm hoping I found the issue. When I was inspecting everything I have read on here, or that I could think of, I ran across this. Must have overlooked it at least 4 times, and never even would have thought, if I wasnt trying to unplug my passenger O2 wire for inspection (which is also burnt, by the way). Got the wires repaired tonight, and will repair O2 extension tomorrow, followed up with kevlar heat wrap and a nice extra ground from back of the block to chassis for the start issues ( I have been ignoring). I will update once I find out if this corrects the issue. Hopefully the damage isnt done and traveled elsewhere in the electrical circuit. Attached Images Last edited by Gordy87; 06-03-2019 at 09:55 PM.

06-03-2019, 11:44 PM	#8
CamaroFred Drives: Miss Con Ception Join Date: Aug 2016 Location: Chicagoland Posts: 2,999	I wonder if a motor mount may have caused the contact. __________________ 2011 1SS/RS LS3 CGM

06-02-2019, 02:57 AM	#2
chevy pilot Drives: 2010 2SS/RS A6 Join Date: May 2019 Location: Hki.Finland Posts: 940	I too have seen the same,max.10-12* of knock. 5-6* of knock is my "normal". I'm also cleaned MAF.I have also made BG Fuel/Air Induction service,they didn't help.

06-04-2019, 07:43 PM	#10
Gordy87 Drives: 2010 Camaro SS Join Date: Oct 2016 Location: Georgia Posts: 300 View My Garage	Needless to say, I got all the wiring repaired, or so I thought. After getting everything back in position and reinstalling fuel line, went to start it for a test run, and nothing, absolutely zip. Battery read only 4v, so after I had hooked battery back and before I had put fuel line on, the battery drained down completely. Back to the drawing board. Will take any advice you guys have, once again.

06-06-2019, 05:26 PM	#12
Gordy87 Drives: 2010 Camaro SS Join Date: Oct 2016 Location: Georgia Posts: 300 View My Garage	Just to put some closure to the thread here. After charging the battery overnight on a trickle charger, I was expecting to throw it back in and let it sit so I could see if it drained back down. So after hooking the battery up to start the agony of what I thought was going to be a painstakingly difficult time of tracking down a short causing a slow drain down of the battery, I found the problem almost immediately. I have attached a picture of my findings. Attached Images

06-06-2019, 05:32 PM	#13
Gordy87 Drives: 2010 Camaro SS Join Date: Oct 2016 Location: Georgia Posts: 300 View My Garage	Apparently these 2 were working on every knob and button on the inside, while I was working on the outside, and after getting all the wiring repaired, as it was pretty late, I just hooked battery back up, and didnt even notice the flashers being on since I didn't attempt to start the car. It's pretty loud, as one of the guys that works for me that lives about 1/8th mile from me states, that he knows when its time to go to work when he hears my car start up in the mornings. So now I feel pretty dumb kinda, but glad it wasnt worse.

06-07-2019, 08:50 AM	#14
camguynj Drives: '13 SS/RS LS3 BRM Cammed NPP Join Date: Jan 2013 Location: NJ Posts: 3,810 View My Garage	Ha Ha! Adorable kids. What's the KR readings now?