Weird change in AFR - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Unreal · 09-23-2016, 08:17 AM

My car runs 10:1 and pulls smoothly to 7400rpm, no issues. I've never seen a car sputter or run like crap at 10:1 under load. My car loves it.

stevieturbo · 09-23-2016, 08:20 AM

He said the problem occurs at low loads too?

Unreal · 09-23-2016, 08:29 AM

Yep, but if gauge is reading fine most of the time, and just does that predictably at mid/wot, sounds like it is going 10:1 when entering PE, which to me indicates something changed, is leaking, or sticking. I doubt it is a gauge issue.

SoChrisB · 09-27-2016, 11:05 AM

So, I cleaned the MAF Sensor and re-calibrated my AFR. It seems to have remediated the issue. Still jumps to 10.0-10.1 at initial hit, but it did that from the beginning. WOT is now about 11.0-11.2 and half throttle is in the 11-12 as well. Still gonna check for any belt split tonight and may still bring it to New Era for peace of mind.

IneedAZ · 09-27-2016, 02:48 PM

Quote:

Originally Posted by SoChrisB

So, I cleaned the MAF Sensor and re-calibrated my AFR. It seems to have remediated the issue. Still jumps to 10.0-10.1 at initial hit, but it did that from the beginning. WOT is now about 11.0-11.2 and half throttle is in the 11-12 as well. Still gonna check for any belt split tonight and may still bring it to New Era for peace of mind.

I clean my Maf every month or two, but I drive 80+ miles a day.

SoChrisB · 10-05-2016, 09:27 AM

Just had it at the tuner. It was a bad AFR sensor. Phew.

stevieturbo · 10-05-2016, 01:48 PM

Everything was pointing to that

09-23-2016, 08:17 AM	#15
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	My car runs 10:1 and pulls smoothly to 7400rpm, no issues. I've never seen a car sputter or run like crap at 10:1 under load. My car loves it. __________________ Nick Corvette Z06 -1200ish rwhp

09-23-2016, 08:29 AM	#17
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Yep, but if gauge is reading fine most of the time, and just does that predictably at mid/wot, sounds like it is going 10:1 when entering PE, which to me indicates something changed, is leaking, or sticking. I doubt it is a gauge issue. __________________ Nick Corvette Z06 -1200ish rwhp

09-23-2016, 08:20 AM	#16
stevieturbo Drives: it changes Join Date: Nov 2010 Location: Norn Iron Posts: 1,128	He said the problem occurs at low loads too?

09-27-2016, 11:05 AM	#18
SoChrisB Drives: 2012 Camaro 2SS/RS Join Date: Aug 2014 Location: Rochester, NY Posts: 598 View My Garage	So, I cleaned the MAF Sensor and re-calibrated my AFR. It seems to have remediated the issue. Still jumps to 10.0-10.1 at initial hit, but it did that from the beginning. WOT is now about 11.0-11.2 and half throttle is in the 11-12 as well. Still gonna check for any belt split tonight and may still bring it to New Era for peace of mind.

10-05-2016, 09:27 AM	#20
SoChrisB Drives: 2012 Camaro 2SS/RS Join Date: Aug 2014 Location: Rochester, NY Posts: 598 View My Garage	Just had it at the tuner. It was a bad AFR sensor. Phew.

10-05-2016, 01:48 PM	#21
stevieturbo Drives: it changes Join Date: Nov 2010 Location: Norn Iron Posts: 1,128	Everything was pointing to that