Cyl no,2 black soot on spark plug......missfire - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Ligenchargess · 09-26-2023, 06:58 PM

yep,,,it happend after a little pull,,,, sure.... it will not be a foul plug,,or coil.....check engine flash at idle..( not always)..runs good when acceletating ,,,..no smoke..no overheating..no codes...its a ls3 engine ,,no DOD

for now ive change plugs,,,,no luck...check valve springs,,they are ok..swap coil wires,,nothing,,,
tomorrow will swap coils and hope for the best,,,, after that will check compression,,,if its good,,,will swap injectors,,to see if problem fallows...i did a quick look at injectors coil and ground wiring and all ok

so what else could it be,,,?

burnt valves or obstruct by carbon build up
crack piston,,hum ,,hope not
bad rings...well no smoke
head gasket,,,maybe not...
bent pushrod ,,, no noise..rocker not loose
bad cam.. no noise
bad lifter,,no noise
bad injector maybe,,,

any input will be appriciated,,,will update thank you

--- Edit --- there is a intermittent metalic tapping ,squeaking..noise that i did not hear at the moment ...mostly wen reving in neutral....going towards bad lifter...and cam ( probably a lifter that gone sideways in the tray...)

RACERJOE1 · 09-30-2023, 09:52 AM

I agree the next step would be the injector swap, if no change then compression test.
Let us know what you find.

Ligenchargess · 10-07-2023, 12:19 PM

Caught it just in time...was a bad lifter..grind marks on the roller...and the roller itself is loose...so ordered a set of Delphi ls7 lifters...cam motion lifter trays..BTR stg 3 supercharger cam...636/636 lift ant 226 duration ..heres some pics of the lifter...will post pisc of damage cam soon

SlowLS1 · 10-07-2023, 01:26 PM

Nice work. This is the pinnacle of knowing your car and responding appropriately. Great catch and she lives for another day.

Ligenchargess · 10-07-2023, 01:46 PM

Quote:

Originally Posted by SlowLS1

Nice work. This is the pinnacle of knowing your car and responding appropriately. Great catch and she lives for another day.

thanks !!

*SSE 4 2SS* · 10-07-2023, 10:40 PM

Great catch…

1JEWLDSSRS · 10-08-2023, 12:27 PM

Awesome find!! This all goes to "knowing" your car and what's going on, AND not pushing it past the point "of no return", causing more damage. Good job sir!!

Ligenchargess · 10-09-2023, 02:10 PM

Here's some pics of the cam..its a LPE GT9..its not so bad.. probably could be reusable with a good polish...but will still go with the BTR stg 3

1JEWLDSSRS · 10-09-2023, 02:17 PM

Yeah, I wouldn't use that one anymore. You could try a polish on the lobe, but I think in doing that as far as it has been damaged, you would risk the chance of taking off more material, just enough to get the lobe in that "soft area" of the metal that hasn't been heat treated to withstand the friction and load, and then you have another problem. Put the new one in and don't look back. Just my .02 dealing with engine internals in the past.

Ligenchargess · 10-09-2023, 02:28 PM

Quote:

Originally Posted by 1JEWLDSSRS

Yeah, I wouldn't use that one anymore. You could try a polish on the lobe, but I think in doing that as far as it has been damaged, you would risk the chance of taking off more material, just enough to get the lobe in that "soft area" of the metal that hasn't been heat treated to withstand the friction and load, and then you have another problem. Put the new one in and don't look back. Just my .02 dealing with engine internals in the past.

yep..i will keep it as a artifact lol !!!!

Ligenchargess · 10-09-2023, 02:30 PM

Quote:

Originally Posted by 1JEWLDSSRS

Awesome find!! This all goes to "knowing" your car and what's going on, AND not pushing it past the point "of no return", causing more damage. Good job sir!!

thank you !!

Ligenchargess · 10-09-2023, 02:32 PM

Quote:

Originally Posted by SSE 4 2SS

Great catch…

thank s !!!!

1JEWLDSSRS · 10-09-2023, 02:38 PM

Quote:

Originally Posted by Ligenchargess

yep..i will keep it as a artifact lol !!!!

Awesome. Yeah I have seen what can happen when you re-use internals that people second guessed on, wasn't pretty, and since you have it all apart, might as just do like we always say, "do it right" once, and be done with it and enjoy the "piece of mind" it's all new. Good luck with your build!!

Ligenchargess · 10-09-2023, 08:12 PM

Quote:

Originally Posted by 1JEWLDSSRS

Awesome. Yeah I have seen what can happen when you re-use internals that people second guessed on, wasn't pretty, and since you have it all apart, might as just do like we always say, "do it right" once, and be done with it and enjoy the "piece of mind" it's all new. Good luck with your build!!

thanks 👍..she should be ready soon !!

09-26-2023, 06:58 PM	#1
Ligenchargess Drives: camaro ss Join Date: Sep 2023 Location: canada Posts: 10	Cyl no,2 black soot on spark plug......missfire yep,,,it happend after a little pull,,,, sure.... it will not be a foul plug,,or coil.....check engine flash at idle..( not always)..runs good when acceletating ,,,..no smoke..no overheating..no codes...its a ls3 engine ,,no DOD for now ive change plugs,,,,no luck...check valve springs,,they are ok..swap coil wires,,nothing,,, tomorrow will swap coils and hope for the best,,,, after that will check compression,,,if its good,,,will swap injectors,,to see if problem fallows...i did a quick look at injectors coil and ground wiring and all ok so what else could it be,,,? burnt valves or obstruct by carbon build up crack piston,,hum ,,hope not bad rings...well no smoke head gasket,,,maybe not... bent pushrod ,,, no noise..rocker not loose bad cam.. no noise bad lifter,,no noise bad injector maybe,,, any input will be appriciated,,,will update thank you --- Edit --- there is a intermittent metalic tapping ,squeaking..noise that i did not hear at the moment ...mostly wen reving in neutral....going towards bad lifter...and cam ( probably a lifter that gone sideways in the tray...) __________________ [2010 camaro ss - lingenfelter heads cam -LT headers - Edelbrock tvs2300-3in pulley - ALKY meth - LPE billet 4.10 diff - LPE 1000whp axles - circle D built 6l80 ( billet internal-welded drums-power glide 4-5-6 clutch pack ) -circle D 2800 Stall - drive shaft shop cromoly - BMR control arms -70/30 front shocks - Last edited by Ligenchargess; 10-07-2023 at 03:30 PM.

10-07-2023, 12:19 PM	#3
Ligenchargess Drives: camaro ss Join Date: Sep 2023 Location: canada Posts: 10	Caught it just in time...was a bad lifter..grind marks on the roller...and the roller itself is loose...so ordered a set of Delphi ls7 lifters...cam motion lifter trays..BTR stg 3 supercharger cam...636/636 lift ant 226 duration ..heres some pics of the lifter...will post pisc of damage cam soon Attached Images __________________ [2010 camaro ss - lingenfelter heads cam -LT headers - Edelbrock tvs2300-3in pulley - ALKY meth - LPE billet 4.10 diff - LPE 1000whp axles - circle D built 6l80 ( billet internal-welded drums-power glide 4-5-6 clutch pack ) -circle D 2800 Stall - drive shaft shop cromoly - BMR control arms -70/30 front shocks -

10-07-2023, 01:26 PM	#4
SlowLS1 Drives: 2010 Camaro SS , 2011 Colorado LS1 Join Date: Jan 2022 Location: Greenville, SC Posts: 827	Nice work. This is the pinnacle of knowing your car and responding appropriately. Great catch and she lives for another day. __________________

10-07-2023, 10:40 PM	#6
SSE 4 2SS Boosted Moderator Drives: Bone Stock LS3 Join Date: Sep 2009 Location: Marion Tx Posts: 15,495	Great catch… __________________ If the car feels like it is on rails, you are probably driving too slow. -Ross Bentley Horsepower is how fast you hit the wall. Torque is how far you take the wall with you. “If everything seems under control, you're just not going fast enough.” Mario Andretti If you can turn, you ain't going fast enough...

10-08-2023, 12:27 PM	#7
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,442	Awesome find!! This all goes to "knowing" your car and what's going on, AND not pushing it past the point "of no return", causing more damage. Good job sir!! __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.

09-30-2023, 09:52 AM	#2
RACERJOE1 Drives: 2014 2SS Join Date: Jul 2014 Location: Prescott, AZ Posts: 67 View My Garage	I agree the next step would be the injector swap, if no change then compression test. Let us know what you find.

10-09-2023, 02:10 PM	#8
Ligenchargess Drives: camaro ss Join Date: Sep 2023 Location: canada Posts: 10	Here's some pics of the cam..its a LPE GT9..its not so bad.. probably could be reusable with a good polish...but will still go with the BTR stg 3 Attached Images __________________ [2010 camaro ss - lingenfelter heads cam -LT headers - Edelbrock tvs2300-3in pulley - ALKY meth - LPE billet 4.10 diff - LPE 1000whp axles - circle D built 6l80 ( billet internal-welded drums-power glide 4-5-6 clutch pack ) -circle D 2800 Stall - drive shaft shop cromoly - BMR control arms -70/30 front shocks -

10-09-2023, 02:17 PM	#9
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,442	Yeah, I wouldn't use that one anymore. You could try a polish on the lobe, but I think in doing that as far as it has been damaged, you would risk the chance of taking off more material, just enough to get the lobe in that "soft area" of the metal that hasn't been heat treated to withstand the friction and load, and then you have another problem. Put the new one in and don't look back. Just my .02 dealing with engine internals in the past. __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.