Please Help me solve this issue - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Birdseed · 08-27-2025, 09:39 PM

First off I would like to start with I appreciate any and all answers.

I have had a cylinder #2 mis-fire for a little while, I replaced the Coil-Pack, spark plug, and spark plug wire. Still missing heavy at idle and under throttle, so I noticed the plug was white when I pulled it which typically means it was running lean. I moved the injector to another cylinder just to verify that was the issue and it followed. So I replaced the Injector with a AC DELCO/OEM Equivalent Part number 0280158051 which is the same part # as the OEM injector that I pulled which is rated for 42LB, I installed the new one, same issue, so I moved that specific injector to cylinder #1 and the miss-fire moved to that cylinder just like the stock one had done previously. Am I missing anything? The only difference I can find between the two new Injectors and the old one, is that the 4 Holes pictured below is smaller on the AC Delco/Bosch compared to the factory one is that the AC Delco/Bosch have a 3 digit code [927] stamped on them where as the oem has [060] I also Purchased the Bosch oem equivalent injector just to make sure the issue was not just with AC Delco. The are all rated for the same flow rate, so I am honestly puzzled. I mean the misfire follows to whichever cylinder it is placed so I am positive that is the issue.

Everything I have read online states that both injectors are plug and play.

bsn · 08-28-2025, 05:40 PM

Are you buying them off Ebay or Amazon?

Birdseed · 08-29-2025, 12:27 AM

Quote:

Originally Posted by bsn

Are you buying them off Ebay or Amazon?

No sir, one came from Autozone, The other Oreilly's

gtstorey · 08-29-2025, 08:39 AM

I don't know what the history of this car is, but the number on the "OEM" is not a stock GM number so who knows what is actually on the car. Maybe they are fake/counterfeit injectors and someone tweaked the tune to make them work.

And there is more to injector data than just flow rate. When does the misfire show up?

b4wheeler · 08-29-2025, 11:03 AM

This is your factory AC Delco PN# 217-2425

Birdseed · 08-29-2025, 01:20 PM

Quote:

Originally Posted by gtstorey

I don't know what the history of this car is, but the number on the "OEM" is not a stock GM number so who knows what is actually on the car. Maybe they are fake/counterfeit injectors and someone tweaked the tune to make them work.

And there is more to injector data than just flow rate. When does the misfire show up?

That is very true. I checked the tune with my brothers HP Tuner setup and everything is factory nothing has been touched tune wise, so I'm thinking what I thought was factory Injectors must have been replaced with some kind of knock off variant. The misfire is across the Entire rpm range, but just on that cylinder.
Thinking I am best off just replacing all 8 Injectors at this point.

Thraul Returns · 08-29-2025, 06:31 PM

Hey man looks like what they sold you isn't correct. Call a Chevy dealer and give them your vin, they'll sort you out.

gtstorey · 08-30-2025, 09:38 PM

The question is, why would someone have replaced stock injectors with a different injector that isn’t for performance reasons. And are the rest of the injectors the same part#. Not sure why only one of your original seem to have failed? Have you checked fuel trims or any logs from Hpt?

08-29-2025, 11:03 AM	#5
b4wheeler Drives: 2011 Camaro 2SS Vert Join Date: Oct 2015 Location: Cordova, Md Posts: 632 View My Garage	This is your factory AC Delco PN# 217-2425 __________________ 2011 2SS/RS Convertible, Victory Red, Roto-Fab CAI, Stainless Power 1 7/8 headers, No Cats, Straight piped, Bo White TB, Circle D, 3.91, ZL1 CONVERSION, CDC Roll bar and some powder coating and dipping.

08-27-2025, 09:39 PM	#1
Birdseed Drives: 2015 Camaro SS 6AT/L99 Join Date: Aug 2025 Location: Louisiana Posts: 3	Please Help me solve this issue First off I would like to start with I appreciate any and all answers. I have had a cylinder #2 mis-fire for a little while, I replaced the Coil-Pack, spark plug, and spark plug wire. Still missing heavy at idle and under throttle, so I noticed the plug was white when I pulled it which typically means it was running lean. I moved the injector to another cylinder just to verify that was the issue and it followed. So I replaced the Injector with a AC DELCO/OEM Equivalent Part number 0280158051 which is the same part # as the OEM injector that I pulled which is rated for 42LB, I installed the new one, same issue, so I moved that specific injector to cylinder #1 and the miss-fire moved to that cylinder just like the stock one had done previously. Am I missing anything? The only difference I can find between the two new Injectors and the old one, is that the 4 Holes pictured below is smaller on the AC Delco/Bosch compared to the factory one is that the AC Delco/Bosch have a 3 digit code [927] stamped on them where as the oem has [060] I also Purchased the Bosch oem equivalent injector just to make sure the issue was not just with AC Delco. The are all rated for the same flow rate, so I am honestly puzzled. I mean the misfire follows to whichever cylinder it is placed so I am positive that is the issue. Everything I have read online states that both injectors are plug and play. Attached Images

08-28-2025, 05:40 PM	#2
bsn Drives: 2013 ZL1 Join Date: Sep 2021 Location: Virginia Posts: 469	Are you buying them off Ebay or Amazon?

08-29-2025, 08:39 AM	#4
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,450	I don't know what the history of this car is, but the number on the "OEM" is not a stock GM number so who knows what is actually on the car. Maybe they are fake/counterfeit injectors and someone tweaked the tune to make them work. And there is more to injector data than just flow rate. When does the misfire show up?

08-29-2025, 06:31 PM	#7
Thraul Returns Drives: 2013 zl1 Join Date: Aug 2023 Location: Minnesota Posts: 29	Hey man looks like what they sold you isn't correct. Call a Chevy dealer and give them your vin, they'll sort you out.

08-30-2025, 09:38 PM	#8
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,450	The question is, why would someone have replaced stock injectors with a different injector that isn’t for performance reasons. And are the rest of the injectors the same part#. Not sure why only one of your original seem to have failed? Have you checked fuel trims or any logs from Hpt?