Misfires on cylinder 1 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

joecranium · 09-09-2021, 03:14 PM

The problem began 3 months ago when I noticed a slightly rough idle at stop lights. Took the car to the same dealer I've used since 2003, with the same Master Technician that I've used for many, many years (he has been great). He said to start by using different gas which I have done. No improvement. Then about a month ago, a service stabilitrack message came on (which it has in the past as well) but also the check engine light came on this time. Back to the dealer. Master tech said he changed the spark plug and wire with a different cylinder, and that plug and wire to the number 1 cylinder. Still misfiring. Said it could be a lifter or about a $6,000 repair. At that, I began to consider a new Camaro. Of course, there is a shortage of cars right. now. I am the original owner of the 2010 Camaro, 2SS, RS, 6-speed. Any and all suggestions and/or advise is greatly appreciated! Thank you!

gtstorey · 09-09-2021, 03:22 PM

Did he give you the DTC that set off the check engine light.

ChibiBlackSheep · 09-09-2021, 03:23 PM

Could also be a fuel injector on that cylinder... I would think if it was a lifter you'd be able to tell in 2 seconds just by hearing it.

I would try another shop and see what their opinion is if you aren't able to diagnose on your own.

joecranium · 09-09-2021, 06:34 PM

Yes, code P0300 and P0301 stored in ECM.

joecranium · 09-09-2021, 06:53 PM

He performed an injector flow test and said within specification. I wonder if this was under load?

gtstorey · 09-09-2021, 08:03 PM

Did he swap coils?

joecranium · 09-09-2021, 08:28 PM

He did swap out the coil.

Batmanntexas · 09-09-2021, 09:28 PM

There are some good speed shops out there in Vegas. Go out near the race track and check out a couple.

$6000 for a lifter job is criminal.

Camaro__ss · 09-09-2021, 09:28 PM

You could compression test that cylinder and compare. That ought to tell if it is something bad

joecranium · 09-10-2021, 09:27 AM

He did report verbally that the compression was fine.

ChibiBlackSheep · 09-10-2021, 09:35 AM

OK, so the car had a compression test, and the mechanic swapped stuff around to see if the code follows. You only mentioned that the P0300 and P0301 codes were stored. After the work was performed and the codes were reset, what code came back?

Is it still the P0300 and P0301? Is it just P0300?

I would pull the MAF and clean it, then pull the 2 fuel fuses. Did your mechanic run fuel pressure tests?

joecranium · 09-10-2021, 10:03 AM

He didn't say if any code came back. Also, he performed injector flow test and it was within specification.

ChibiBlackSheep · 09-10-2021, 10:11 AM

Quote:

Originally Posted by joecranium

He didn't say if any code came back. Also, he performed injector flow test and it was within specification.

Do you see a CEL, that would let you know if a code is there. Are you still seeing misfiring after the work performed and switching to different gas?

Are you running 93 octane?

Injector flow != fuel pressure. If your pump is starting to fail and not letting fuel flow at the right rate you can get random misfire codes (p0300)

joecranium · 09-10-2021, 11:14 AM

The CEL is no longer there. He reset it and it has not returned. Also, I have not gotten into the throttle hard. That's when it came on initially. Still seems like a slight misfire to me at idle since the rpms fluctuate a bit then. I have only used 93 octane gas for the life of the car.

09-09-2021, 03:14 PM	#1
joecranium Drives: 2022 Chevy Camaro 1LT/RS M6 Join Date: Apr 2010 Location: Las Vegas Posts: 22	Misfires on cylinder 1 The problem began 3 months ago when I noticed a slightly rough idle at stop lights. Took the car to the same dealer I've used since 2003, with the same Master Technician that I've used for many, many years (he has been great). He said to start by using different gas which I have done. No improvement. Then about a month ago, a service stabilitrack message came on (which it has in the past as well) but also the check engine light came on this time. Back to the dealer. Master tech said he changed the spark plug and wire with a different cylinder, and that plug and wire to the number 1 cylinder. Still misfiring. Said it could be a lifter or about a $6,000 repair. At that, I began to consider a new Camaro. Of course, there is a shortage of cars right. now. I am the original owner of the 2010 Camaro, 2SS, RS, 6-speed. Any and all suggestions and/or advise is greatly appreciated! Thank you! __________________

09-09-2021, 03:23 PM	#3
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,085	Could also be a fuel injector on that cylinder... I would think if it was a lifter you'd be able to tell in 2 seconds just by hearing it. I would try another shop and see what their opinion is if you aren't able to diagnose on your own. __________________ 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

09-09-2021, 06:34 PM	#4
joecranium Drives: 2022 Chevy Camaro 1LT/RS M6 Join Date: Apr 2010 Location: Las Vegas Posts: 22	Yes, code P0300 and P0301 stored in ECM. __________________

09-09-2021, 06:53 PM	#5
joecranium Drives: 2022 Chevy Camaro 1LT/RS M6 Join Date: Apr 2010 Location: Las Vegas Posts: 22	He performed an injector flow test and said within specification. I wonder if this was under load? __________________

09-09-2021, 08:28 PM	#7
joecranium Drives: 2022 Chevy Camaro 1LT/RS M6 Join Date: Apr 2010 Location: Las Vegas Posts: 22	He did swap out the coil. __________________ Last edited by joecranium; 09-10-2021 at 09:24 AM.

09-09-2021, 03:22 PM	#2
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,143	Did he give you the DTC that set off the check engine light.

09-09-2021, 08:03 PM	#6
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,143	Did he swap coils?

09-09-2021, 09:28 PM	#8
Batmanntexas Drives: 2012 Camaro SS (2SS) Join Date: Aug 2012 Location: Stafford, VA Posts: 1,372 View My Garage	There are some good speed shops out there in Vegas. Go out near the race track and check out a couple. $6000 for a lifter job is criminal. __________________ 745RWHP/634RWTQ on 93 @ 10psi 806/676 on E85 @ 10psi COTW 9/8/14

09-09-2021, 09:28 PM	#9
Camaro__ss Drives: 2013 L99 Join Date: Jan 2019 Location: San Antonio TX Posts: 185	You could compression test that cylinder and compare. That ought to tell if it is something bad

09-10-2021, 09:27 AM	#10
joecranium Drives: 2022 Chevy Camaro 1LT/RS M6 Join Date: Apr 2010 Location: Las Vegas Posts: 22	He did report verbally that the compression was fine. __________________

09-10-2021, 09:35 AM	#11
ChibiBlackSheep Drives: 2012 2SS/RS, 1968 SS Join Date: Feb 2012 Location: Southeast, PA Posts: 2,085	OK, so the car had a compression test, and the mechanic swapped stuff around to see if the code follows. You only mentioned that the P0300 and P0301 codes were stored. After the work was performed and the codes were reset, what code came back? Is it still the P0300 and P0301? Is it just P0300? I would pull the MAF and clean it, then pull the 2 fuel fuses. Did your mechanic run fuel pressure tests? __________________ 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

09-10-2021, 10:03 AM	#12
joecranium Drives: 2022 Chevy Camaro 1LT/RS M6 Join Date: Apr 2010 Location: Las Vegas Posts: 22	He didn't say if any code came back. Also, he performed injector flow test and it was within specification. __________________

09-10-2021, 11:14 AM	#14
joecranium Drives: 2022 Chevy Camaro 1LT/RS M6 Join Date: Apr 2010 Location: Las Vegas Posts: 22	The CEL is no longer there. He reset it and it has not returned. Also, I have not gotten into the throttle hard. That's when it came on initially. Still seems like a slight misfire to me at idle since the rpms fluctuate a bit then. I have only used 93 octane gas for the life of the car. __________________ Last edited by joecranium; 09-10-2021 at 12:35 PM.