18:1 AFR??!! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

booneSS13 · 05-27-2017, 05:12 PM

This is the second time I have my car out tuning on nitrous. I'm running C16 in a stand alone. Last time I sprayed, my AFR sat at around 10.8:1. I'm usually constantly 11.8:1 WOT on the motor and 10.8:1 on nitrous. Now I'm 12.5-13.2:1 on the motor and 18:1 and up on nitrous! My idle and normal driving is still the same around 14.7:1 stoich. The only thing I've changed was the plugs. I've went from b8efs to b9efs. The car doesn't seem to feel any different than normal under normal conditions and wot.

Anyone have any ideas? I was thinking maybe I leas fouled the O2 sensor but if that's the case why does it seem to function normally under normal driving and idle?

gsxrturbo · 05-27-2017, 05:19 PM

my guess is your spaying nitrous without fuel.turn off the nitrous bottle and run the nitrous system then check yr air fuel

UNRIVALED SS · 05-27-2017, 05:40 PM

Fuel solenoid , clogged nozzle or jet, stand alone pump, it's a fuel supply issue. Since it's happening on motor and on nitrous it could even be an injector that is a little off.

The previous post is a real good way to start troubleshooting.

booneSS13 · 05-27-2017, 07:04 PM

Quote:

Originally Posted by gsxrturbo

my guess is your spaying nitrous without fuel.turn off the nitrous bottle and run the nitrous system then check yr air fuel

That's great idea! I'm going to try that tonight and report back what I get

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booneSS13 · 05-27-2017, 07:05 PM

Quote:

Originally Posted by UNRIVALED SS

Fuel solenoid , clogged nozzle or jet, stand alone pump, it's a fuel supply issue. Since it's happening on motor and on nitrous it could even be an injector that is a little off.

The previous post is a real good way to start troubleshooting.

What would cause an Injector to be off? How would i narrow down to which injector it is? I'm going to try the above step as well

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fif_gen_powa · 05-27-2017, 07:27 PM

Quote:

Originally Posted by booneSS13

What would cause an Injector to be off? How would i narrow down to which injector it is? I'm going to try the above step as well

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Pull all the plugs, one will be different than all the others

booneSS13 · 05-27-2017, 07:33 PM

Quote:

Originally Posted by fif_gen_powa

Pull all the plugs, one will be different than all the others

I'll do that tonight as well. Thanks

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booneSS13 · 05-27-2017, 07:36 PM

Also if my a/f was that far lean, wouldn't it make the car shudder or backfire? This is on a pretty big shot.

UNRIVALED SS · 05-27-2017, 09:15 PM

I doubt it is an injector.

I don't get to drive mine at time. Fuel can cause corrosion/rust on injectors and anything with moisture in it. Just an idea to feed thought.

I think you will find it's a fairly minor issue but I have seen some crazy things. I wouldn't rule anything out. Good news is you caught it before you broke a piston or bent a rod.

booneSS13 · 05-27-2017, 09:18 PM

Quote:

Originally Posted by UNRIVALED SS

I doubt it is an injector.

I don't get to drive mine at time. Fuel can cause corrosion/rust on injectors and anything with moisture in it. Just an idea to feed thought.

I think you will find it's a fairly minor issue but I have seen some crazy things. I wouldn't rule anything out. Good news is you caught it before you broke a piston or bent a rod.

Yeah that's for sure! That's why it's always a good idea to have a wideband gauge when you're FI

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booneSS13 · 05-28-2017, 12:02 AM

I found out after troubleshooting with the methods you guys suggested that I had my fuel solenoids channel on my NOS mini set to a 1 sec. Delay! Ouch! I fuel and nitrous on separate channels due to the amp drain of 4 solenoids since I'm running a direct port system.

I'm still trying to figure out why while n/a I'm 13:1 when before yesterday I was always 11.8:1. I don't want to spray again with new plugs until I sort that out. Any ideas?

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UNRIVALED SS · 05-28-2017, 05:37 AM

Again there are so many variables.

Is it possible you got into some fuel that isn't consistent? Anything can throw off a wide ban. Exhaust leak maybe ? I'm guess the engine seems to be running fine, you just have a change in AFR.

avido · 05-28-2017, 03:30 PM

Quote:

Originally Posted by booneSS13

I found out after troubleshooting with the methods you guys suggested that I had my fuel solenoids channel on my NOS mini set to a 1 sec. Delay! Ouch! I fuel and nitrous on separate channels due to the amp drain of 4 solenoids since I'm running a direct port system.

I'm still trying to figure out why while n/a I'm 13:1 when before yesterday I was always 11.8:1. I don't want to spray again with new plugs until I sort that out. Any ideas?

Sent from my VS990 using Tapatalk

what wideband do you have? id you try to calibrate it?
what data logger are you using?

Trackman · 05-28-2017, 03:37 PM

I'm surprised you needed to go to a 9 heat range.

05-27-2017, 05:12 PM	#1
booneSS13 Drives: 2013 Camaro SS LS3 Join Date: Jun 2015 Location: Davenport IA Posts: 718	18:1 AFR??!! This is the second time I have my car out tuning on nitrous. I'm running C16 in a stand alone. Last time I sprayed, my AFR sat at around 10.8:1. I'm usually constantly 11.8:1 WOT on the motor and 10.8:1 on nitrous. Now I'm 12.5-13.2:1 on the motor and 18:1 and up on nitrous! My idle and normal driving is still the same around 14.7:1 stoich. The only thing I've changed was the plugs. I've went from b8efs to b9efs. The car doesn't seem to feel any different than normal under normal conditions and wot. Anyone have any ideas? I was thinking maybe I leas fouled the O2 sensor but if that's the case why does it seem to function normally under normal driving and idle? __________________ *Romans 5:8* But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. -Fastlane Cold Air Intake, NPP cat back exhaust, Stainless Works LT Headers, 2r max camshaft, Stage 3 Ported Heads (Manley Stainless steel values, titanium retainers, dual valve springs, bronze guides), Wiseco Forged Pistons, K1 Forged Rods, Clevite Bearings, Factory Crankshaft, Comp Cams rocker arm trunion kit, Morel 5315 lifters, JP performance single billet timing chain, Melling oil pump, Spec stage 3+ clutch and flywheel, BMR trailing arms, Nitto 555r 305/35/20.

05-27-2017, 05:40 PM	#3
UNRIVALED SS Drives: 2010 Camaro SS Join Date: Aug 2010 Location: El Paso Posts: 704 View My Garage	Check each component Fuel solenoid , clogged nozzle or jet, stand alone pump, it's a fuel supply issue. Since it's happening on motor and on nitrous it could even be an injector that is a little off. The previous post is a real good way to start troubleshooting.

05-27-2017, 07:36 PM	#8
booneSS13 Drives: 2013 Camaro SS LS3 Join Date: Jun 2015 Location: Davenport IA Posts: 718	Also if my a/f was that far lean, wouldn't it make the car shudder or backfire? This is on a pretty big shot. __________________ *Romans 5:8* But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. -Fastlane Cold Air Intake, NPP cat back exhaust, Stainless Works LT Headers, 2r max camshaft, Stage 3 Ported Heads (Manley Stainless steel values, titanium retainers, dual valve springs, bronze guides), Wiseco Forged Pistons, K1 Forged Rods, Clevite Bearings, Factory Crankshaft, Comp Cams rocker arm trunion kit, Morel 5315 lifters, JP performance single billet timing chain, Melling oil pump, Spec stage 3+ clutch and flywheel, BMR trailing arms, Nitto 555r 305/35/20.

05-27-2017, 09:15 PM	#9
UNRIVALED SS Drives: 2010 Camaro SS Join Date: Aug 2010 Location: El Paso Posts: 704 View My Garage	Injector I doubt it is an injector. I don't get to drive mine at time. Fuel can cause corrosion/rust on injectors and anything with moisture in it. Just an idea to feed thought. I think you will find it's a fairly minor issue but I have seen some crazy things. I wouldn't rule anything out. Good news is you caught it before you broke a piston or bent a rod.

05-28-2017, 12:02 AM	#11
booneSS13 Drives: 2013 Camaro SS LS3 Join Date: Jun 2015 Location: Davenport IA Posts: 718	I found out after troubleshooting with the methods you guys suggested that I had my fuel solenoids channel on my NOS mini set to a 1 sec. Delay! Ouch! I fuel and nitrous on separate channels due to the amp drain of 4 solenoids since I'm running a direct port system. I'm still trying to figure out why while n/a I'm 13:1 when before yesterday I was always 11.8:1. I don't want to spray again with new plugs until I sort that out. Any ideas? Sent from my VS990 using Tapatalk __________________ *Romans 5:8* But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. -Fastlane Cold Air Intake, NPP cat back exhaust, Stainless Works LT Headers, 2r max camshaft, Stage 3 Ported Heads (Manley Stainless steel values, titanium retainers, dual valve springs, bronze guides), Wiseco Forged Pistons, K1 Forged Rods, Clevite Bearings, Factory Crankshaft, Comp Cams rocker arm trunion kit, Morel 5315 lifters, JP performance single billet timing chain, Melling oil pump, Spec stage 3+ clutch and flywheel, BMR trailing arms, Nitto 555r 305/35/20.

05-27-2017, 05:19 PM	#2
gsxrturbo Drives: 2010 ss Join Date: Oct 2015 Location: windom mn Posts: 337	my guess is your spaying nitrous without fuel.turn off the nitrous bottle and run the nitrous system then check yr air fuel

05-28-2017, 05:37 AM	#12
UNRIVALED SS Drives: 2010 Camaro SS Join Date: Aug 2010 Location: El Paso Posts: 704 View My Garage	Fuel ? Again there are so many variables. Is it possible you got into some fuel that isn't consistent? Anything can throw off a wide ban. Exhaust leak maybe ? I'm guess the engine seems to be running fine, you just have a change in AFR.

05-28-2017, 03:37 PM	#14
Trackman Drives: 67RS Camaro ,Black 2013 ZL1 Join Date: Jun 2010 Location: Alberta Posts: 1,408	I'm surprised you needed to go to a 9 heat range.