Fuel/ Air Mixture/Check Engine Light/Mods - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

nightshift · 01-20-2012, 05:57 PM

I posted this in the Engine mods section but it's probably better off here.

Last week I installed and Airaid intake and today I installed a Solo Axel back with J pipes. Shortly after the exhaust install, my check engine light came on. Onstar said my vehicle is running lean (Fuel/Air) based on the codes. I contacted Solo and asked if this was something they have come across with their system. I was told they have not encountered this issue and perhaps there was an exhaust leak.

I took it back to the exhaust shop and had them check. There is no leak. Onstar said based on the modifications, the computer may reset itself in a few days/miles after it adjusts to the increased airflow.

Has anyone encountered anything like this? I'm hoping the ship rights itself as I don't want to go to the dealer or have to troubleshoot this issue with the vendors. Thanks,

-Nick

Steck · 01-20-2012, 07:11 PM

You most likely have a vacuum leak on the intake system after the MAF.

67badbird · 01-20-2012, 10:36 PM

Yes this happend to Me after mods....I cleard the code {P0171} and it has not came back on.

evilbeef54 · 01-20-2012, 11:19 PM

i too just got a CEL, i installed Kooks LTs and HFCs about a week ago, no CEL drove a few hundred miles probably since the install. Put on my CAI intake and scoop yesterday and driving around today i got a CEL, not sure if it is from the headers or a leak, after reading this i need to go check my intake again to see if there is a leak

bluetorp · 01-21-2012, 12:36 AM

What Steck said. Most likely there's a leak in the intake somewhere past the MAF letting unmetered air in.

nightshift · 01-21-2012, 02:12 AM

Quote:

Originally Posted by Steck@Craven

You most likely have a vacuum leak on the intake system after the MAF.

It was the intake. The hose clamp attached to the throttle body was loose. CEL reset itself after about 70 miles and light is gone......thankfully. Runs and sounds great! I'm always impressed at the knowledge on this board. It is the best resource out there for these cars. I appreciate the tuners and vendors chiming in with their input. Thanks!

-Nick

evilbeef54 · 01-21-2012, 03:58 PM

Well I double checked the installation of my CAI and re-adjusted and tightened everything...
then i found my LM2 WBO2 and scanner it was a p0420 which is a cat efficency code, so it is probably from the LTs and not being tuned, I cleared the code we will see if it comes back, i guess it was just coincidence that it poped up right after doing the CAI install

01-20-2012, 05:57 PM	#1
nightshift Drives: Victory Red 2011 2SS/RS Join Date: Mar 2011 Location: San Diego Posts: 289	Fuel/ Air Mixture/Check Engine Light/Mods I posted this in the Engine mods section but it's probably better off here. Last week I installed and Airaid intake and today I installed a Solo Axel back with J pipes. Shortly after the exhaust install, my check engine light came on. Onstar said my vehicle is running lean (Fuel/Air) based on the codes. I contacted Solo and asked if this was something they have come across with their system. I was told they have not encountered this issue and perhaps there was an exhaust leak. I took it back to the exhaust shop and had them check. There is no leak. Onstar said based on the modifications, the computer may reset itself in a few days/miles after it adjusts to the increased airflow. Has anyone encountered anything like this? I'm hoping the ship rights itself as I don't want to go to the dealer or have to troubleshoot this issue with the vendors. Thanks, -Nick

01-20-2012, 11:19 PM	#4
evilbeef54 tail lights for u Drives: Bumble Bee 2010 2SS/RS Join Date: Apr 2010 Location: Where ever USCG sends me Posts: 370	i too just got a CEL, i installed Kooks LTs and HFCs about a week ago, no CEL drove a few hundred miles probably since the install. Put on my CAI intake and scoop yesterday and driving around today i got a CEL, not sure if it is from the headers or a leak, after reading this i need to go check my intake again to see if there is a leak __________________ 1972 Camaro 350/Muncie M22 - SOLD 1986 Camaro RS - R.I.P. 1994 Camaro Z28 - SOLD 2010 Camaro 2SS/RS RY M6- LOVIN' it Kooks LT's & HFC's, Flowmaster Single chamber mufflers, C.A.I. Intake, ADM Scoop, Rotofab w/w relocate Semper Paratus You have to go out You don't have to come back!!!

01-21-2012, 12:36 AM	#5
bluetorp Drives: 2010 2SS/RS IOM M6 Join Date: May 2011 Location: Abu Dhabi, UAE Posts: 288	What Steck said. Most likely there's a leak in the intake somewhere past the MAF letting unmetered air in. __________________ Whipple 2.9L S/C, ARH LT's, Flowmaster AMT, HPTuners

01-21-2012, 03:58 PM	#7
evilbeef54 tail lights for u Drives: Bumble Bee 2010 2SS/RS Join Date: Apr 2010 Location: Where ever USCG sends me Posts: 370	Well I double checked the installation of my CAI and re-adjusted and tightened everything... then i found my LM2 WBO2 and scanner it was a p0420 which is a cat efficency code, so it is probably from the LTs and not being tuned, I cleared the code we will see if it comes back, i guess it was just coincidence that it poped up right after doing the CAI install __________________ 1972 Camaro 350/Muncie M22 - SOLD 1986 Camaro RS - R.I.P. 1994 Camaro Z28 - SOLD 2010 Camaro 2SS/RS RY M6- LOVIN' it Kooks LT's & HFC's, Flowmaster Single chamber mufflers, C.A.I. Intake, ADM Scoop, Rotofab w/w relocate Semper Paratus You have to go out You don't have to come back!!!

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01-20-2012, 07:11 PM	#2
Steck Account Suspended Drives: 2006 twin turbo Corvette Z06 Join Date: Nov 2011 Location: St. Louis, MO Posts: 114	You most likely have a vacuum leak on the intake system after the MAF.

01-20-2012, 10:36 PM	#3
67badbird Drives: 2010 Camaro 2SS/RS 1967firebird 632 Join Date: Jan 2012 Location: Texas Posts: 45 View My Garage	Yes this happend to Me after mods....I cleard the code {P0171} and it has not came back on.