Random misfire? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BowtieBelle · 12-31-2013, 11:10 AM

Getting a CEL with random misfire and misfire on cylinder 2 and 6. My SA suggested I swap coilpacks with 1 and 4 and see if that changes the misfire. And a friend suggested it could be the knock sensor plug/wire from when I had a cat replaced a few weeks back. I cleared the code once two weeks ago and it came back today with another random misfire code. Anyone else got any other ideas or has this happened to you in cold weather? It's not running weird and I don't hear anything strange. No loss of power or any other indications of a problem. Btw this is on an LLT.

Thanks y'all!

MichaelH · 12-31-2013, 11:38 AM

Try the coil packs and spark plugs and see if it helps, if that doesn't help it go away than try getting fuel system and injector cleaner hooked up to your fuel lines to see if maybe it's just gunked up. If that doesn't work than you may have to open her up and check your timing chains. Thing that worried me is that you have two cylinders doing it and not just one. Usually one means spark plug and coil

MichaelH · 12-31-2013, 11:40 AM

This just happened to a customer that brought his cts into service. Was only cylinder 4 and we changed his spark plug and coil and was good as new.

Evil-Bee-NH · 12-31-2013, 11:51 AM

mentioned this on the V6 LLT forum aswell but run dry gas and injector cleaner through it before anything else took mine 3 days to clear same two cylinder misfires like the other guy said gunked up probably because of the moisture from the fuel blend change. BTW Ethanol sucks so much in our cars for this.

MagnumForceGB · 12-31-2013, 11:59 AM

If you have a ported intake manifold, make sure the filler is in one piece and not inside the runners.

BowtieBelle · 12-31-2013, 12:40 PM

Alright I grabbed some of this. Will run it through and see if the code comes back since we cleared it. If the code comes back will swap coilpacks and check knock sensor plug/bolt. Name: ImageUploadedByTapatalk1388515237.682605.jpg
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Name: ImageUploadedByTapatalk1388515237.682605.jpg
Views: 3303
Size: 93.2 KB

snymat68 · 12-31-2013, 12:43 PM

Good luck! Keep us informed.

BowtieBelle · 12-31-2013, 12:43 PM

When the light came back on today it didn't show 2 and 6. Just random misfire.

BowtieBelle · 12-31-2013, 12:50 PM

I'm really thinking the gunk and moisture from fuel is a possibility. The car has 90k miles on it and I've only run seafoam through it twice and it was a long time ago. Gotta start maintaining now that she's aging.

snymat68 · 12-31-2013, 12:54 PM

=Stephens= · 12-31-2013, 01:02 PM

I have had the same thing happen to me, I have 60,000 miles on mine. With some research, I found out that my K& N CAI, was fouling my MAF sensor. This was then causing this CEL. I got some MAF cleaner and sprayed my sensor and it has taken care of it. Because the air filter has oil on it, the oil gets on the sensor causing the fouling. Performance hasn't been effected, just that annoy CEL.
http://youtu.be/aJLNQcFosSo

BowtieBelle · 12-31-2013, 01:07 PM

I may spray the MAF with cleaner too. I have noticed a reduction in my gas mileage lately too; more than the usual drop with winter fuel blend.

=Stephens= · 12-31-2013, 01:23 PM

Quote:

Originally Posted by BowtieBelle

I may spray the MAF with cleaner too. I have noticed a reduction in my gas mileage lately too; more than the usual drop with winter fuel blend.

That is probably your foot hammering the gas because it's so much fun to drive fast. That seems to be my problem lately.

snymat68 · 12-31-2013, 01:47 PM

^ This

12-31-2013, 11:10 AM	#1
BowtieBelle They see me trollin'... Drives: 217 ci of fury; Chauffeured by SS Join Date: Jul 2011 Location: Oklahoma Posts: 13,876 View My Garage	Random misfire? Getting a CEL with random misfire and misfire on cylinder 2 and 6. My SA suggested I swap coilpacks with 1 and 4 and see if that changes the misfire. And a friend suggested it could be the knock sensor plug/wire from when I had a cat replaced a few weeks back. I cleared the code once two weeks ago and it came back today with another random misfire code. Anyone else got any other ideas or has this happened to you in cold weather? It's not running weird and I don't hear anything strange. No loss of power or any other indications of a problem. Btw this is on an LLT. Thanks y'all! __________________ "Never race anything you can't afford to light on fire and push off a cliff." -CamaroSpike 2011 Custom LT/RS: Bella's Build Thread

12-31-2013, 11:38 AM	#2
MichaelH SOCAL HT5 Drives: 2013 BRM ZL1 M6 Join Date: Apr 2010 Location: NE Ohio Posts: 1,495 View My Garage	Try the coil packs and spark plugs and see if it helps, if that doesn't help it go away than try getting fuel system and injector cleaner hooked up to your fuel lines to see if maybe it's just gunked up. If that doesn't work than you may have to open her up and check your timing chains. Thing that worried me is that you have two cylinders doing it and not just one. Usually one means spark plug and coil __________________ 2013 ZL1 M6 - Mods-in the works Old vehicles 2010 CGM Camaro (sold) Other Vehicles: 2008 Kawasaki ZX6R-115 RWHP in mid summer 2006 Chevy Trailblazer SS- For Sale; Lots of extras

12-31-2013, 11:40 AM	#3
MichaelH SOCAL HT5 Drives: 2013 BRM ZL1 M6 Join Date: Apr 2010 Location: NE Ohio Posts: 1,495 View My Garage	This just happened to a customer that brought his cts into service. Was only cylinder 4 and we changed his spark plug and coil and was good as new. __________________ 2013 ZL1 M6 - Mods-in the works Old vehicles 2010 CGM Camaro (sold) Other Vehicles: 2008 Kawasaki ZX6R-115 RWHP in mid summer 2006 Chevy Trailblazer SS- For Sale; Lots of extras

12-31-2013, 11:51 AM	#4
Evil-Bee-NH 603 Camaros Drives: 2017 NGM I4 1LT Coupe Join Date: May 2012 Location: Manchester, NH Posts: 6,779 View My Garage	mentioned this on the V6 LLT forum aswell but run dry gas and injector cleaner through it before anything else took mine 3 days to clear same two cylinder misfires like the other guy said gunked up probably because of the moisture from the fuel blend change. BTW Ethanol sucks so much in our cars for this. __________________ MY 2017 I4 CAMARO BUILD JOURNAL \| YOUTUBE \| INSTAGRAM \| 316RWHP - 385 RWTQ HPTUNERS DYNO TUNE \| 12.693s @ 105MPH 1/4 Mile

12-31-2013, 11:59 AM	#5
MagnumForceGB Drives: Fastest 2010 Camaro V6 Join Date: Apr 2010 Location: Newcastle, OK Posts: 3,571 View My Garage	If you have a ported intake manifold, make sure the filler is in one piece and not inside the runners. __________________ Camaro V6 = 11.268 @ 120.11

12-31-2013, 12:40 PM	#6
BowtieBelle They see me trollin'... Drives: 217 ci of fury; Chauffeured by SS Join Date: Jul 2011 Location: Oklahoma Posts: 13,876 View My Garage	Alright I grabbed some of this. Will run it through and see if the code comes back since we cleared it. If the code comes back will swap coilpacks and check knock sensor plug/bolt. __________________ "Never race anything you can't afford to light on fire and push off a cliff." -CamaroSpike 2011 Custom LT/RS: Bella's Build Thread

12-31-2013, 12:43 PM	#7
snymat68 Drives: 2013 Blue Ray 1LS M6 Join Date: Apr 2013 Location: Pittsburgh, PA Posts: 1,227 View My Garage	Good luck! Keep us informed. __________________ Performance Mods Elite Catch Can \| CAI Intake with Scoop & Washer Bottle Relocation \| MRT v2 Axle-Back Exhaust \| MagnaFlow Resonated X-Pipe \| Resonator Delete \| Vmax Ported Throttle Body \| GM Strut Tower Brace \| JDP Tow Hook \| Vitesse Throttle Controller Aesthetic Mods Chrome Peek-A-Boo Door Handles \| Interior Accessories Kit \| OEM RS HIDs w/ 6000k Bulbs & 5000k LED Fogs \| Tail Light, Marker Light, & Turn Signal Tint \| Tru-Sequence Sequential Turn Signals & Brake Lights \| Silver Fade Gill Stripes \| Carbon Fiber Bowties \| Various Chrome/Painted/Carbon Fiber Items

12-31-2013, 12:50 PM	#9
BowtieBelle They see me trollin'... Drives: 217 ci of fury; Chauffeured by SS Join Date: Jul 2011 Location: Oklahoma Posts: 13,876 View My Garage	I'm really thinking the gunk and moisture from fuel is a possibility. The car has 90k miles on it and I've only run seafoam through it twice and it was a long time ago. Gotta start maintaining now that she's aging. __________________ "Never race anything you can't afford to light on fire and push off a cliff." -CamaroSpike 2011 Custom LT/RS: Bella's Build Thread

12-31-2013, 12:54 PM	#10
snymat68 Drives: 2013 Blue Ray 1LS M6 Join Date: Apr 2013 Location: Pittsburgh, PA Posts: 1,227 View My Garage	Attached Images __________________ Performance Mods Elite Catch Can \| CAI Intake with Scoop & Washer Bottle Relocation \| MRT v2 Axle-Back Exhaust \| MagnaFlow Resonated X-Pipe \| Resonator Delete \| Vmax Ported Throttle Body \| GM Strut Tower Brace \| JDP Tow Hook \| Vitesse Throttle Controller Aesthetic Mods Chrome Peek-A-Boo Door Handles \| Interior Accessories Kit \| OEM RS HIDs w/ 6000k Bulbs & 5000k LED Fogs \| Tail Light, Marker Light, & Turn Signal Tint \| Tru-Sequence Sequential Turn Signals & Brake Lights \| Silver Fade Gill Stripes \| Carbon Fiber Bowties \| Various Chrome/Painted/Carbon Fiber Items

12-31-2013, 01:02 PM	#11
=Stephens= Drives: 2011 LS Join Date: Feb 2011 Location: Kearney, Nebraska Posts: 3,541 View My Garage	I have had the same thing happen to me, I have 60,000 miles on mine. With some research, I found out that my K& N CAI, was fouling my MAF sensor. This was then causing this CEL. I got some MAF cleaner and sprayed my sensor and it has taken care of it. Because the air filter has oil on it, the oil gets on the sensor causing the fouling. Performance hasn't been effected, just that annoy CEL. http://youtu.be/aJLNQcFosSo Last edited by =Stephens=; 12-31-2013 at 01:21 PM.

12-31-2013, 01:07 PM	#12
BowtieBelle They see me trollin'... Drives: 217 ci of fury; Chauffeured by SS Join Date: Jul 2011 Location: Oklahoma Posts: 13,876 View My Garage	I may spray the MAF with cleaner too. I have noticed a reduction in my gas mileage lately too; more than the usual drop with winter fuel blend. __________________ "Never race anything you can't afford to light on fire and push off a cliff." -CamaroSpike 2011 Custom LT/RS: Bella's Build Thread

12-31-2013, 01:47 PM	#14
snymat68 Drives: 2013 Blue Ray 1LS M6 Join Date: Apr 2013 Location: Pittsburgh, PA Posts: 1,227 View My Garage	^ This __________________ Performance Mods Elite Catch Can \| CAI Intake with Scoop & Washer Bottle Relocation \| MRT v2 Axle-Back Exhaust \| MagnaFlow Resonated X-Pipe \| Resonator Delete \| Vmax Ported Throttle Body \| GM Strut Tower Brace \| JDP Tow Hook \| Vitesse Throttle Controller Aesthetic Mods Chrome Peek-A-Boo Door Handles \| Interior Accessories Kit \| OEM RS HIDs w/ 6000k Bulbs & 5000k LED Fogs \| Tail Light, Marker Light, & Turn Signal Tint \| Tru-Sequence Sequential Turn Signals & Brake Lights \| Silver Fade Gill Stripes \| Carbon Fiber Bowties \| Various Chrome/Painted/Carbon Fiber Items