ZL1 Fuel Trims and Tune Question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

479ls3 · 06-06-2019, 10:18 AM

I'll start with that my knowledge for reading OBD and tuning is pretty much zero.

I've been having some issues with my car running like it's pulling a boat after a recent tune for new injectors (previous owner didn't upgrade injectors with the upper 2.55 pulley upgrade). The car made 575 rwhp and 598 TQ during the dyno tune, but shortly after I could sense something wasn't right. Sure enough, I take the car to a friend's local shop and we plug it into his reader (I believe it's the Snap On Solus) to begin logging and immediately notice the car is bouncing anywhere from -13% to -20% on the fuel trims at idle and around -17% to -25% under normal load (cruising). The car will need a retune but my question is do these fuel trims carry over into enabled power enrichment (WOT)?

*I understand at this point I should not be driving the car much and certainly not at WOT until it's fixed.

RobZL1 · 06-06-2019, 11:19 AM

Positive LTFT's carry into PE, but negative ones do not.

06-06-2019, 10:18 AM	#1
479ls3 2014 Camaro ZL1 6MT Drives: 2014 ZL1 Join Date: Mar 2016 Location: Arkansas Posts: 125	ZL1 Fuel Trims and Tune Question I'll start with that my knowledge for reading OBD and tuning is pretty much zero. I've been having some issues with my car running like it's pulling a boat after a recent tune for new injectors (previous owner didn't upgrade injectors with the upper 2.55 pulley upgrade). The car made 575 rwhp and 598 TQ during the dyno tune, but shortly after I could sense something wasn't right. Sure enough, I take the car to a friend's local shop and we plug it into his reader (I believe it's the Snap On Solus) to begin logging and immediately notice the car is bouncing anywhere from -13% to -20% on the fuel trims at idle and around -17% to -25% under normal load (cruising). The car will need a retune but my question is do these fuel trims carry over into enabled power enrichment (WOT)? *I understand at this point I should not be driving the car much and certainly not at WOT until it's fixed. __________________ 2013 Camaro 1SS/RS 6MT - SOLD 2014 Camaro ZL1 6MT - 😎

06-06-2019, 11:19 AM	#2
RobZL1 fo'shizZL1 Drives: 2017 ZL1 Join Date: Aug 2017 Location: ATL Posts: 1,281	Positive LTFT's carry into PE, but negative ones do not. __________________ 2017 ZL1 M6 Black \| Maggie 2650 // 103TB // Big Gulp Past Rides- 2014 ZL1 M6 Red Hot \| Tons of mods 2004 CTS-V M6 Silver \| Many mods 1995 Corvette M6 Torch Red \| A few more mods 1992 Camaro M5 White \| A few mods