Dialing In Fuel, FBGI0
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bad86capri
- Posts: 163
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- Location: Knoxville, TN
- Vehicle Information: 1986 Capri 306, Twisted Wedge heads, RPM II Intake, Anderson B3 cam, 80Lbs Siemens Injectors, MAC Longtube Headers, G-Force T5, Spec 6 Puck Clutch, Ford Racing Aluminum Driveshaft.
Dialing In Fuel, FBGI0
I was going over one of my old logs and came across something interesting. Im running the FBGI0. At Idle, Lambse was .68-.71, lambda was .70 and Fuel_Error1 was 1.38-1.49 and KAMS were 1.00 and not moving. Can somebody help me understand what was going on here? Or explain to me how this works?
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bad86capri
- Posts: 163
- Joined: 2021 Feb 16, 10:09
- Location: Knoxville, TN
- Vehicle Information: 1986 Capri 306, Twisted Wedge heads, RPM II Intake, Anderson B3 cam, 80Lbs Siemens Injectors, MAC Longtube Headers, G-Force T5, Spec 6 Puck Clutch, Ford Racing Aluminum Driveshaft.
Re: Dialing In Fuel, FBGI0
Heres the BIN
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- ZYA2_FBGI0_Bills_Mach.bin
- (256 KiB) Downloaded 137 times
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decipha
- Posts: 5041
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'19 F-150 3.3L
Re: Dialing In Fuel, FBGI0
all sounds perfectly normal. Its fully detailed in the fuel write up on the homepage.
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bad86capri
- Posts: 163
- Joined: 2021 Feb 16, 10:09
- Location: Knoxville, TN
- Vehicle Information: 1986 Capri 306, Twisted Wedge heads, RPM II Intake, Anderson B3 cam, 80Lbs Siemens Injectors, MAC Longtube Headers, G-Force T5, Spec 6 Puck Clutch, Ford Racing Aluminum Driveshaft.
Re: Dialing In Fuel, FBGI0
Good deal. I was confused because of the lambse being .68-.71. I was expecting lambse to be coming from the fuel table.
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bad86capri
- Posts: 163
- Joined: 2021 Feb 16, 10:09
- Location: Knoxville, TN
- Vehicle Information: 1986 Capri 306, Twisted Wedge heads, RPM II Intake, Anderson B3 cam, 80Lbs Siemens Injectors, MAC Longtube Headers, G-Force T5, Spec 6 Puck Clutch, Ford Racing Aluminum Driveshaft.
Re: Dialing In Fuel, FBGI0
OK. After reading the fuel write-up again its still not making sense to me why it would be commanding the .70 lambse. ive opened up the tune and cant figure out table is making is making changes to the base fuel table. The closed loop flag is set and i was at 150 degrees.
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decipha
- Posts: 5041
- Joined: 2021 Feb 15, 12:23
- Location: Metairie, LA
- Vehicle Information: Work Truck
'19 F-150 3.3L
Re: Dialing In Fuel, FBGI0
in closed loop the ecu has no fuel control so it cant command anything thus the only lambda you should get in closed loop is 1.0 stoich since that is all the o2 is capable of switching at.
lambse will ramp up til the o2 switches lean and then ramp back down to make the o2 switch rich again in a never ending closed loop.
In closed loop the o2 sensors are controlling fuel by switching the ecu cannot command any air/fuel ratio as its purely mechanical by the o2 sensors generating voltage.
lambse will ramp up til the o2 switches lean and then ramp back down to make the o2 switch rich again in a never ending closed loop.
In closed loop the o2 sensors are controlling fuel by switching the ecu cannot command any air/fuel ratio as its purely mechanical by the o2 sensors generating voltage.
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SOAB_465
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stock return fuel system with Walbro 255 in-tank pump and aeromotive adjustable regulator.
2008 4.6
PI Heads and Cams
9:1 forged pistons
Forged H-Beam Rods
60lb Deka injectors
BA2800 MAF
2.3L whipple supercharger intercooled approx 13 PSI
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PLX Wideband
GM 3bar MAP
Re: Dialing In Fuel, FBGI0
sounds like a problem in your O2 circuit.
If Lambse is less than 1 it's waiting for the O2 to switch rich. If Lambse and your Wideband are that close, your fuel is pretty near dialed in. The only thing I can think of that would cause this is your front O2 sensors aren't responding. Watch IEGO11 and IEGO21. they should be switching rapidly around .4V or so.
If Lambse is less than 1 it's waiting for the O2 to switch rich. If Lambse and your Wideband are that close, your fuel is pretty near dialed in. The only thing I can think of that would cause this is your front O2 sensors aren't responding. Watch IEGO11 and IEGO21. they should be switching rapidly around .4V or so.