Open Loop Off Idle Stumble
I have been having this problem and I can't seem to tune it out. When the engine is cold if I try to drive right away the AFR gauge will show lean and it will bog/stumble really hard before coming around. I will upload the tune I have right now just incase it is something stupid I'm missing. If not I will try and get a log of it happening sometime soon. Any idea on what might be causing it or how to fix it/tune it out would be awesome.
Last edited by hartigan85; 09-20-2012 at 12:05 PM.
Atmospheric Acquisition
Sydney - 2009 G8 GT - Liquid Red, Onyx/Red interior, Flat Black Rally Stripes
Performance: Tuned By Me Using HP Tuners, TMS Forged 402, Ported LSA Supercharger 2.5/9.5, AIS Dual Nozzle Water/Methanol Kit, Super Chiller, ID850 Injectors, Rick C. Blower Cam, Morel Lifters, Comp Trunion Upgrade, Roto-Fab CAI, Kooks 1 7/8 Mids, Solo Mach Shorty Exhaust w/ 3.5" tips, CTS-V Torque Converter, Camaro 3.45 Diff, 6 Piston Front/4 Piston Rear Brembo Brakes, ZL1 Fuel Pump/BAP, Saikou Michi Dual Catch Cans, Spohn Trailing Arms & Toe Links, BMR Cradle & Diff Bushings, Derale Trans Cooler, SJM Line Lock.
Pictures
No help huh? Where did all the tuners go?
Atmospheric Acquisition
Sydney - 2009 G8 GT - Liquid Red, Onyx/Red interior, Flat Black Rally Stripes
Performance: Tuned By Me Using HP Tuners, TMS Forged 402, Ported LSA Supercharger 2.5/9.5, AIS Dual Nozzle Water/Methanol Kit, Super Chiller, ID850 Injectors, Rick C. Blower Cam, Morel Lifters, Comp Trunion Upgrade, Roto-Fab CAI, Kooks 1 7/8 Mids, Solo Mach Shorty Exhaust w/ 3.5" tips, CTS-V Torque Converter, Camaro 3.45 Diff, 6 Piston Front/4 Piston Rear Brembo Brakes, ZL1 Fuel Pump/BAP, Saikou Michi Dual Catch Cans, Spohn Trailing Arms & Toe Links, BMR Cradle & Diff Bushings, Derale Trans Cooler, SJM Line Lock.
Pictures
I feel your pain, lol...I'd help if I knew what I was doing...lol
Anybody...
Atmospheric Acquisition
Sydney - 2009 G8 GT - Liquid Red, Onyx/Red interior, Flat Black Rally Stripes
Performance: Tuned By Me Using HP Tuners, TMS Forged 402, Ported LSA Supercharger 2.5/9.5, AIS Dual Nozzle Water/Methanol Kit, Super Chiller, ID850 Injectors, Rick C. Blower Cam, Morel Lifters, Comp Trunion Upgrade, Roto-Fab CAI, Kooks 1 7/8 Mids, Solo Mach Shorty Exhaust w/ 3.5" tips, CTS-V Torque Converter, Camaro 3.45 Diff, 6 Piston Front/4 Piston Rear Brembo Brakes, ZL1 Fuel Pump/BAP, Saikou Michi Dual Catch Cans, Spohn Trailing Arms & Toe Links, BMR Cradle & Diff Bushings, Derale Trans Cooler, SJM Line Lock.
Pictures
Two things to look at-
Try raising your "Target idle speed vs. Coolent Temp vs. (drive, park ac on off)" @ 68* to 1000, 90* to 955 and 111* to 875
Then look at your maf airflow vs. frequency chart. From what I have learned you want nice and smooth, yours is very jagged looking.
good luck
the only other settings that I'm wondering about is your Stoich AFR chart, it's doubled...
is it because you're running meth?
That's a byproduct of the id850 injectors... has to do with them... mine is the same...Originally Posted by GeoffA
2009 PBM G8 GT
Pat G 218/226 & TSP Dual 660s, ARP Bits, DSteck Tuned, Magnacharger Chrome 2300 1:1, RCR Ported/Polished TB, Blower, & L92 Heads w/ LS3 intake valves, Smith Brothers Trunion Bushing Kit, ARH 1 7/8 Magnaflow MidMuff/Solo Axlebacks, RotoFab, VaporWorx PWM 1:1 fuel system, ID1050x injectors
Mike Norris Motorsports Catchcan, AEM 30-4100, JHP Boost/Fuel Gauge Pod
TSW Nurburgring Matte Gray 18" w/Nitto 555 & 555R, Satin Black SS Brembo Fronts, BMR Trailing Arms, Pedders Sway Bars, Whiteline Bushings
Gloss Black Valve Covers, 6k HID, V6 Handles, Interior/License Plate LEDs, Debadged, Holden Black Trim, Polk Dxi, GXP diffusor, a few bits from Crazy Paul
RIP Charlie - GRRRR8Originally Posted by TonyKarter
Anyone who has ever worked on a car has been in your position, and sitting cross-legged on a concrete floor with a dim shop light is its own kind of hell... Chalk it up as one of the rites of passage.
RIP Chris Wells - Panzer Leader
I also have an off idle stumble, going to talk to PatG about it.
Let me know if Pat figures it out.
Atmospheric Acquisition
Sydney - 2009 G8 GT - Liquid Red, Onyx/Red interior, Flat Black Rally Stripes
Performance: Tuned By Me Using HP Tuners, TMS Forged 402, Ported LSA Supercharger 2.5/9.5, AIS Dual Nozzle Water/Methanol Kit, Super Chiller, ID850 Injectors, Rick C. Blower Cam, Morel Lifters, Comp Trunion Upgrade, Roto-Fab CAI, Kooks 1 7/8 Mids, Solo Mach Shorty Exhaust w/ 3.5" tips, CTS-V Torque Converter, Camaro 3.45 Diff, 6 Piston Front/4 Piston Rear Brembo Brakes, ZL1 Fuel Pump/BAP, Saikou Michi Dual Catch Cans, Spohn Trailing Arms & Toe Links, BMR Cradle & Diff Bushings, Derale Trans Cooler, SJM Line Lock.
Pictures
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