What causes a cylinder 5 misfire - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

usmc-ashton · 12-29-2012, 03:26 PM

My cel came on, went to autozone they diagnosed it as a cylinder 5 misfire. Also did an onstar diagnostics..they said multiple misfires

what can cause this? How can it be fixed?? My car was in the shop for 4 months while I was deployed. Now I come back to this

can it be fuel injectors or something? Help! I want to enjoy her lol
Happy holidays

ackeight · 12-29-2012, 04:58 PM

check the plug and wire?

usmc-ashton · 12-29-2012, 05:18 PM

If I do check it, what would I have to look for??

GaBoy25 · 12-29-2012, 05:37 PM

Quote:

Originally Posted by usmc-ashton

If I do check it, what would I have to look for??

Make sure plugs aren't cracked and that the plug wire is fully engaged in both ends (clicking into place)

Happened to me before

AC · 12-29-2012, 05:47 PM

At what RPMs did the misfire happen?

usmc-ashton · 12-29-2012, 06:01 PM

You dont really feel a misfire but around 2,000 rpms when you try to do a hard acceleration it'll kinda..well..it just won't pick up like before..and my wires seem fine there in properly. I hope it's nothing serious :(

AC · 12-29-2012, 06:26 PM

The reason i asked it sounds similar to what i had. when they ran the code it should have told them at what rpms the misfire happened. mine would misfire at about 3000 rpms on the 3rd cylinder. it was not misfiring under 3000 so it was very hard to diagnose. dealer had mine for 2 days tyring to figure it out, even gave it back to me 2 times thinking they fixed it. what finally fixed it was we switched the coils around....so im thinking bad connection maybe... they did put some updates on the computer and one updated rerouted the wiring harness. So not 100% sure what fixed it but that was 10,000 miles ago and all good.

tonyko1 · 12-29-2012, 07:45 PM

On a different car, not my Camaro, but I had misfire cylinder #3 on the diagnostic tool. Turns out the end of the spark plug that meets up with the wire harness came undone, like it wasn't screwed in all the way, which I never knew it could do (autolite spark plug). I changed out all the plugs to Bosch and it has been fine since.

Spark plugs are cheap, easy place to start.

05stram · 01-01-2013, 05:56 PM

misfire? a plug misfire or an injector misfire? Code would me most helpful. Setting for a little bit may be the key - fully charge the battery, run injector cleaner through it, and if it is still there let the dealer figure it out - cheapest in the long run instead of chasing parts.

Russell James · 01-01-2013, 06:05 PM

I'd take it to the dealer. Many possible causes from simple to ... needs a new motor. Only way to tell will be to have a technician diagnose it.

A friend of mine went through some misfire problems with an LLT. One dealer farted around with it trying top engine cleaning, a few other things... then another dealer fixed it right by - replacing the engine. Really no way to know until a skilled technician looks at it. There are several bulletins for things to look for ... from minor to order a new engine.

TooCool5 · 01-02-2013, 11:05 AM

Take it to the dealer, there is a re-flash for this.

SirPhobos1 · 01-02-2013, 01:37 PM

Quote:

Originally Posted by TooCool5

Take it to the dealer, there is a re-flash for this.

Do you happen to know the TSB to reference for this? I experienced a rough idle/CEL this morning that I believe is related to the weather. A phone call to the service tech resulted with nothing.

If I have a TSB # to give him (and the document number #2542524 referenced in another thread was not a legit TSB number, at least to him) It would greatly help my case.

TooCool5 · 01-03-2013, 07:05 PM

Quote:

Originally Posted by SirPhobos1

Do you happen to know the TSB to reference for this? I experienced a rough idle/CEL this morning that I believe is related to the weather. A phone call to the service tech resulted with nothing.

If I have a TSB # to give him (and the document number #2542524 referenced in another thread was not a legit TSB number, at least to him) It would greatly help my case.

Its SB PI 0284.
Let us know how it works out.

SirPhobos1 · 01-07-2013, 09:41 PM

Quote:

Originally Posted by TooCool5

Its SB PI 0284.
Let us know how it works out.

The strangest thing happened.... my CEL light turned off before the shop could look at it. Guess I'll have to wait for it to happen again, IF it happens again.

I had the codes read at Autozone. Random misfires, Misfire in Cyl 01,04,06. Only happened once after letting it sit for a few days when we got a bunch of snow.

12-29-2012, 03:26 PM	#1
usmc-ashton Drives: 2010 camaro v6 black, bbk intake Join Date: Nov 2011 Location: westchester NY Posts: 47	What causes a cylinder 5 misfire My cel came on, went to autozone they diagnosed it as a cylinder 5 misfire. Also did an onstar diagnostics..they said multiple misfires what can cause this? How can it be fixed?? My car was in the shop for 4 months while I was deployed. Now I come back to this can it be fuel injectors or something? Help! I want to enjoy her lol Happy holidays

12-29-2012, 05:47 PM	#5
AC *GO HOGS GO* Drives: 68/327 & 10 2SS SIM w/ CGM Stripes Join Date: Jun 2010 Location: NW Arkansas Posts: 1,796 View My Garage	At what RPMs did the misfire happen? __________________ ProCharger F1A, ID1000 Injectors, SW Headers, SW full 3" Exhaust, BMR Suspension, CCW 10"/11.5", DBA Rotors, 3.91's, 560/570 hp/tq ProCharger F1A, VMax TB, ID1000 Injectors, SW Headers, SW full 3" Exhaust, BMR Suspension & 4 Point Strut Tower Brace, 3.91 Gears, DBA Rotors Heritage Grille, CCW SP16a Wheels 10"/11.5" Nitto 275/40 315/35, Painted Calipers, Blackout: Bowtie, Rear Panel, Markers & Side Vents, SS Fender Badges, 6.2L Cowl Lettering, Pistol Grip Shifter, RPI SS Door Kick Plates, Billet Cup Holder, Fesler Shift Boot, Lloyd Floor Mats..(1/4: 12.917 @ 109.63)

12-29-2012, 06:26 PM	#7
AC *GO HOGS GO* Drives: 68/327 & 10 2SS SIM w/ CGM Stripes Join Date: Jun 2010 Location: NW Arkansas Posts: 1,796 View My Garage	The reason i asked it sounds similar to what i had. when they ran the code it should have told them at what rpms the misfire happened. mine would misfire at about 3000 rpms on the 3rd cylinder. it was not misfiring under 3000 so it was very hard to diagnose. dealer had mine for 2 days tyring to figure it out, even gave it back to me 2 times thinking they fixed it. what finally fixed it was we switched the coils around....so im thinking bad connection maybe... they did put some updates on the computer and one updated rerouted the wiring harness. So not 100% sure what fixed it but that was 10,000 miles ago and all good. __________________ ProCharger F1A, ID1000 Injectors, SW Headers, SW full 3" Exhaust, BMR Suspension, CCW 10"/11.5", DBA Rotors, 3.91's, 560/570 hp/tq ProCharger F1A, VMax TB, ID1000 Injectors, SW Headers, SW full 3" Exhaust, BMR Suspension & 4 Point Strut Tower Brace, 3.91 Gears, DBA Rotors Heritage Grille, CCW SP16a Wheels 10"/11.5" Nitto 275/40 315/35, Painted Calipers, Blackout: Bowtie, Rear Panel, Markers & Side Vents, SS Fender Badges, 6.2L Cowl Lettering, Pistol Grip Shifter, RPI SS Door Kick Plates, Billet Cup Holder, Fesler Shift Boot, Lloyd Floor Mats..(1/4: 12.917 @ 109.63)

01-02-2013, 11:05 AM	#11
TooCool5 Drives: 2010 Camaro 1LS 3.6 LLT V6 325 HP Join Date: May 2009 Location: LS Posts: 4,244 View My Garage	Take it to the dealer, there is a re-flash for this. __________________ 2010 Camaro Auto, Inferno Orange, Titanium Interior, Gearhead Wheels AIRAID CAI

12-29-2012, 04:58 PM	#2
ackeight Drives: 10' 2SS/RS Join Date: Jan 2010 Location: Rockwall, TX Posts: 1,389 View My Garage	check the plug and wire? __________________ ADM tuned 412HP/407RWTQ. Kooks 2" headers w/ cats, ADM race intake, Vmax TB, Pedders XA coilovers and ZL1 sways. 1le clone

12-29-2012, 05:18 PM	#3
usmc-ashton Drives: 2010 camaro v6 black, bbk intake Join Date: Nov 2011 Location: westchester NY Posts: 47	If I do check it, what would I have to look for??

12-29-2012, 06:01 PM	#6
usmc-ashton Drives: 2010 camaro v6 black, bbk intake Join Date: Nov 2011 Location: westchester NY Posts: 47	You dont really feel a misfire but around 2,000 rpms when you try to do a hard acceleration it'll kinda..well..it just won't pick up like before..and my wires seem fine there in properly. I hope it's nothing serious :(

12-29-2012, 07:45 PM	#8
tonyko1 Banned Drives: 2012 Camaro 2SS/RS Convertible, IBM Join Date: Jun 2012 Location: Oregon Posts: 1,015	On a different car, not my Camaro, but I had misfire cylinder #3 on the diagnostic tool. Turns out the end of the spark plug that meets up with the wire harness came undone, like it wasn't screwed in all the way, which I never knew it could do (autolite spark plug). I changed out all the plugs to Bosch and it has been fine since. Spark plugs are cheap, easy place to start.

01-01-2013, 05:56 PM	#9
05stram Drives: 2013 RS - 2013 2SS/RS - 1971 RS Join Date: Sep 2012 Location: West Virginia Posts: 1,027	misfire? a plug misfire or an injector misfire? Code would me most helpful. Setting for a little bit may be the key - fully charge the battery, run injector cleaner through it, and if it is still there let the dealer figure it out - cheapest in the long run instead of chasing parts.

01-01-2013, 06:05 PM	#10
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,483	I'd take it to the dealer. Many possible causes from simple to ... needs a new motor. Only way to tell will be to have a technician diagnose it. A friend of mine went through some misfire problems with an LLT. One dealer farted around with it trying top engine cleaning, a few other things... then another dealer fixed it right by - replacing the engine. Really no way to know until a skilled technician looks at it. There are several bulletins for things to look for ... from minor to order a new engine.