2012 Camaro v6 won’t stay running!! Please Help - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Jsal120 · 08-07-2020, 01:59 PM

So I have a 2012 camaro v6 and one day I was driving down the road and was braking to stop at a light and the car stalled and everything cut off, luckily i was able to roll into a parking lot. I tried to start it but car would start but then begin too shake bad and sputter and backfire then die. I unplugged the maf sensor and the car ran fine enough to get me home but the next day I tried to do the same and the car would just die after starting even with the maf sensor in and out.I suspected fuel pump but I ran a fuel pressure test and the car in the on position was getting 55-60psi then when I start the car it was about 45psi but car still shakes and sputters and dies once it gets into idle. I changed maf sensor, changed evap solenoid, cleaned throttle body but still the car won’t stay on, any ideas? Also sounds like it is backfiring through intake and sputters then dies.

xstuntman · 08-07-2020, 02:05 PM

I think i read average fuel pressure is 75ish psi so grab a manual and start checking pumps.
I believe there are two, a fuel pump and booster pump.

sdynak · 08-07-2020, 03:51 PM

Do you have a check engine light or any codes? I am not familiar with the V6 but I understand they have some timing chain issues. Maybe that is what is going on with the backfiring through intake. Sounds like valve timing is off.

redcoats1976 · 08-07-2020, 06:58 PM

seems like a stretched/jumped timing chain would pop a code though.

Jsal120 · 08-07-2020, 07:13 PM

Quote:

Originally Posted by sdynak

Do you have a check engine light or any codes? I am not familiar with the V6 but I understand they have some timing chain issues. Maybe that is what is going on with the backfiring through intake. Sounds like valve timing is off.

Here’s the codes

LilyAnna · 08-07-2020, 07:24 PM

See screenshots for fuel pressure reference. V6 specific info, hope it helps!

Jsal120 · 08-07-2020, 07:47 PM

Quote:

Originally Posted by LilyAnna

See screenshots for fuel pressure reference. V6 specific info, hope it helps!

I just changed fuel pump and the car is still sputtering and stalling and backfiring through intake.

'10CamaroDude · 08-07-2020, 10:17 PM

Unplug the Intake VVT soleniods, they are the TOP ones on each side. That will set the
cam phasers fully advanced on both sides, see how it runs.

I get some back-popping out the exhaust side at the cold hi-idle. Once the RPMs come
down, it's fine, then fine running from then on. I tried three different VVT solenoids,
aftermarket causing an even worse condition at cold idle. If I disconnect the exhaust
VVT solenoid on that side, it doesn't do it at all.

SO, I know I need an exhaust cam phaser there...

NO codes at all... I do get the code associated with disconnecting the VVT solenoid.

08-07-2020, 01:59 PM	#1
Jsal120 Drives: 2013 camaro 45th anniversary v6 Join Date: Aug 2020 Location: Florida Posts: 3	2012 Camaro v6 won’t stay running!! Please Help So I have a 2012 camaro v6 and one day I was driving down the road and was braking to stop at a light and the car stalled and everything cut off, luckily i was able to roll into a parking lot. I tried to start it but car would start but then begin too shake bad and sputter and backfire then die. I unplugged the maf sensor and the car ran fine enough to get me home but the next day I tried to do the same and the car would just die after starting even with the maf sensor in and out.I suspected fuel pump but I ran a fuel pressure test and the car in the on position was getting 55-60psi then when I start the car it was about 45psi but car still shakes and sputters and dies once it gets into idle. I changed maf sensor, changed evap solenoid, cleaned throttle body but still the car won’t stay on, any ideas? Also sounds like it is backfiring through intake and sputters then dies.

08-07-2020, 02:05 PM	#2
xstuntman Drives: 2012 Victory Red LFX Join Date: Dec 2012 Location: west central Texas Posts: 1,310	I think i read average fuel pressure is 75ish psi so grab a manual and start checking pumps. I believe there are two, a fuel pump and booster pump. __________________ 2018 SS wheels, red Heritage grille, actual driving lights, ZL1 strut tower brace, GM Performance billet aluminum fuel door, front grille Bowtie delete, painted red rotors and calipers, 1/4 window American Flags, splash guards, AEM dry panel air filter.

08-07-2020, 03:51 PM	#3
sdynak Drives: 2010 1SS Join Date: Aug 2015 Location: Bayville, NJ Posts: 936	Do you have a check engine light or any codes? I am not familiar with the V6 but I understand they have some timing chain issues. Maybe that is what is going on with the backfiring through intake. Sounds like valve timing is off. __________________ 2010 1SS LS3, Black, 235/250, .621/.615, 114 + 4, Kooks Stepped Headers, 3.91's, Bo White PTB, Flowmaster Mufflers, Cold Air Industries CAI, Apex Scoop & Windshield Washer Relocate, SLP Wheels, Skip Shift Eliminate, Barton Flat Stick, OEM HID/Halos, Dyno Tuned by ECS

08-07-2020, 07:24 PM	#6
LilyAnna Drives: 2013 Camaro LFX 2LT Join Date: Mar 2020 Location: Sunny Mexico Posts: 64	See screenshots for fuel pressure reference. V6 specific info, hope it helps! Attached Images

08-07-2020, 06:58 PM	#4
redcoats1976 Drives: LT W/2LT,blue metallic Join Date: Jul 2016 Location: central florida Posts: 4,915	seems like a stretched/jumped timing chain would pop a code though.

08-07-2020, 10:17 PM	#8
'10CamaroDude Account Suspended Drives: 2010 Camaro LS Join Date: Nov 2019 Location: Pgh Posts: 739 View My Garage	Unplug the Intake VVT soleniods, they are the TOP ones on each side. That will set the cam phasers fully advanced on both sides, see how it runs. I get some back-popping out the exhaust side at the cold hi-idle. Once the RPMs come down, it's fine, then fine running from then on. I tried three different VVT solenoids, aftermarket causing an even worse condition at cold idle. If I disconnect the exhaust VVT solenoid on that side, it doesn't do it at all. SO, I know I need an exhaust cam phaser there... NO codes at all... I do get the code associated with disconnecting the VVT solenoid.