Opinions needed: possible bad injector? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ABMLS3 · 10-26-2016, 10:15 AM

*Please read everything before coming to a conclusion and don't just look at the pictures*
So last night I was driving my car and when I got on it, it made sort of like a squeaking noise coming from the engine bay than the car started misfiring and popping. Pops during acceleration and deceleration. When I got home I figured out which cylinder it was and checked the spark plug. The ceramic piece on the plug was cracked so I put a new one in. Started it up and it idled fine until I held the gas steady at around 1500 rpm than the misfiring came back. Took it for a drive about half a mile down the road came back and the new spark plug was completely white.
I did a little researched and found out that cracking of the ceramic insulator is due to high temps. If my injector was bad it would be running lean cause high temps and Mis firing.
It is only the one cylinder with a bad spark plug which would cause me to think that it would be the injector.

First picture is the cracked ceramic plug that was originally in (the piston didn't hit the plug and close the gap, I'm holding it upside down and the ceramic is just resting on the ground electrode.)

Second picture is the new plug I drove with for about half a mile

What do you guys think? My first guess would be bad injector possibly but I'm not sure. Any tests I could do to pinpoint the issue?

UPDATE: just finished changing all my spark plugs, found two more plugs with cracked ceramic.. now with all new spark plugs it's running perfect. Maybe it was just time for new plugs? I'll drive it around a little and check the spark plus again to see how they look

ilir14 · 10-26-2016, 11:24 AM

Hate to say it but to hit that spark plug like that its got to be a broken cylinder

ABMLS3 · 10-26-2016, 12:19 PM

Quote:

Originally Posted by ilir14

Hate to say it but to hit that spark plug like that its got to be a broken cylinder

Did you read everything I wrote? Piston didn't hit the spark plug, ceramic part is cracked and I'm holding it upside down which is making the ceramic fall and touch the ground part

1KillerSS · 10-26-2016, 04:02 PM

Go pick up a fuel injector tester from any auto parts store and start checking them. You can also leave the car idling and disconnect each injector one at a time, listen for idle change. That will tell you if they are pulsing also.

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10-26-2016, 10:15 AM	#1
ABMLS3 Drives: 2010 Aqua Blue Camaro 2SS/RS Join Date: May 2013 Location: Long Island NY Posts: 657	Opinions needed: possible bad injector? Please read everything before coming to a conclusion and don't just look at the pictures So last night I was driving my car and when I got on it, it made sort of like a squeaking noise coming from the engine bay than the car started misfiring and popping. Pops during acceleration and deceleration. When I got home I figured out which cylinder it was and checked the spark plug. The ceramic piece on the plug was cracked so I put a new one in. Started it up and it idled fine until I held the gas steady at around 1500 rpm than the misfiring came back. Took it for a drive about half a mile down the road came back and the new spark plug was completely white. I did a little researched and found out that cracking of the ceramic insulator is due to high temps. If my injector was bad it would be running lean cause high temps and Mis firing. It is only the one cylinder with a bad spark plug which would cause me to think that it would be the injector. First picture is the cracked ceramic plug that was originally in (the piston didn't hit the plug and close the gap, I'm holding it upside down and the ceramic is just resting on the ground electrode.) Second picture is the new plug I drove with for about half a mile What do you guys think? My first guess would be bad injector possibly but I'm not sure. Any tests I could do to pinpoint the issue? UPDATE: just finished changing all my spark plugs, found two more plugs with cracked ceramic.. now with all new spark plugs it's running perfect. Maybe it was just time for new plugs? I'll drive it around a little and check the spark plus again to see how they look Attached Images __________________ Power Source Performance Turbo Kit 416 C.I ,TH400 Instagram: TomTraube COTW ABMLS3 Build Thread Last edited by ABMLS3; 10-26-2016 at 02:20 PM.

10-26-2016, 04:02 PM	#4
1KillerSS Too much is never enough! Drives: AGP TT SS [COTW] 4/20/15 Join Date: Feb 2014 Location: Toledo,OH Posts: 4,149 View My Garage	Go pick up a fuel injector tester from any auto parts store and start checking them. You can also leave the car idling and disconnect each injector one at a time, listen for idle change. That will tell you if they are pulsing also. Sent from my iPhone using Tapatalk __________________ AGP TT kit, 54/57 Forged rotating assembly, Custom grind cam... Dual nozzle meth, ID850's, Livernois dual fuel pumps, ECS BAP, 25% UDP, 3 inch Magnaflow catback with X pipe, Mantic 9000 clutch, DSS 1000hp axles, DSS aluminum driveshaft, ZL1 rear end, solid subframe bushings, HE differential offset bushings, BMR Trailing arm, BMR toe rods, Lingenfelter LNC-2000,SJM Line Lock. 747 whp 714wtq *Build thread* http://www.camaro5.com/forums/showth...55#post8107855

10-26-2016, 11:24 AM	#2
ilir14 Drives: Camaro ss 1le Join Date: Jan 2014 Location: Houston,Tx Posts: 470	Hate to say it but to hit that spark plug like that its got to be a broken cylinder