Config:Fuel - Revision history

Ogalic: /* Inhibit closed loop fuel after cut */

2026-02-02T08:18:43Z

Inhibit closed loop fuel after cut

← Older revision		Revision as of 08:18, 2 February 2026
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	Pause closed loop fueling after deceleration fuel cut occurs. Set this to a little longer than however long is required for normal fueling behavior to resume after fuel cut.		Pause closed loop fueling after deceleration fuel cut occurs. Set this to a little longer than however long is required for normal fueling behavior to resume after fuel cut.

	~~'''~~Use DFCO exit enrichment~~'''~~		==== Use DFCO exit enrichment ====
			When exiting DCFO and all the fuel film from the intake runners has evaporated, there is a lean condition on the first few combustion events when resuming normal injection. This attempts to fix that by injecting extra fuel on DCFO exit.

	~~PLACEHOLDER~~		==== DFCO exit enrichment max RPM ====
			This is the maximum RPM for DCFO exit enrichment.
	~~'''~~DFCO exit enrichment max RPM~~'''~~

	~~PLACEHOLDER~~

	==== Ignition retard during cut ====		==== Ignition retard during cut ====

Ogalic: /* Predictive Map Blend Duration */

2026-02-01T19:53:17Z

Predictive Map Blend Duration

← Older revision		Revision as of 19:53, 1 February 2026
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	== Predictive Map Blend Duration ==		== Predictive Map Blend Duration ==

	~~PLACEHOLDER~~		This is the duration for the [[Config:Fuel#MAP estimate table\|MAP estimation]].

	== TPS AE: RPM correction ==		== TPS AE: RPM correction ==

Ogalic: /* TPS AE instant pulse multiplier vs RPM */

2026-02-01T19:52:05Z

TPS AE instant pulse multiplier vs RPM

← Older revision		Revision as of 19:52, 1 February 2026
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	== Staged Injector % table ==		== Staged Injector % table ==

	~~PLACEHOLDER~~		Dtaged injector % table is how much of the staged injector to be used at RPM vs load. 0% means here all primary, and 100% all secondary fuel injectors.

	== Staged Injector Small Pulsewidth Table ==		== Staged Injector Small Pulsewidth Table ==
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	== Short term fuel trim Add Authority (+) ==		== Short term fuel trim Add Authority (+) ==
			Define how much fuel the short-term trim system is allowed to add at a given RPM vs. load (MAP/AFR) point.

	~~PLACEHOLDER~~		For example, if you want the system to only add fuel in boost and never remove it, you can set the '''Remove Map''' to 0 above 100 kPa and above, say, 2000 RPM.

	== Short term fuel trim Remove Authority (-) ==		== Short term fuel trim Remove Authority (-) ==

	~~PLACEHOLDER~~		Define how much fuel the short-term trim system is allowed to add at a given RPM vs. load (MAP/AFR) point.

			If you want the fuel trim to reset immediately on lift-off (when vacuum drops very low and the engine rides the bottom row of the map), you can set the authority to 0 in that area.

	= VE Table Switch =		= VE Table Switch =
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	== TPS AE instant pulse multiplier vs RPM ==		== TPS AE instant pulse multiplier vs RPM ==
	This is the RPM multiplier for		This is the RPM multiplier for the [[Config:Fuel#Instant Fuel Pulse\|instant fuel pulse.]]

	== TPS AE instant pulse multiplier vs TPS ==		== TPS AE instant pulse multiplier vs TPS ==
			This is the TPS multiplier for the [[Config:Fuel#Instant Fuel Pulse\|instant fuel pulse.]]
	~~PLACEHOLDER~~

	== TPS AE instant pulse multiplier vs MAP ==		== TPS AE instant pulse multiplier vs MAP ==
			This is the MAP multiplier for the [[Config:Fuel#Instant Fuel Pulse\|instant fuel pulse.]]
	~~PLACEHOLDER~~

	== TPS AE instant pulse multiplier vs CLT ==		== TPS AE instant pulse multiplier vs CLT ==
			This is the CLT multiplier for the [[Config:Fuel#Instant Fuel Pulse\|instant fuel pulse.]]
	~~PLACEHOLDER~~

	== Evap from wall time ==		== Evap from wall time ==
			This is the base evaporation time of the fuel based on coolant temperature (Tau)

	== Stick to wall fraction ==		== Stick to wall fraction ==
			This is the base impact fraction basaed on coolant temperature (Beta)

	== Evap from wall table ==		== Evap from wall table ==
			This is the Tau table in regards to MAP.
	~~PLACEHOLDER~~

	== Stick to wall table ==		== Stick to wall table ==
			This is the Beta table in regards to MAP.
	~~PLACEHOLDER~~

	= Throttle Model Flow =		= Throttle Model Flow =
			Uses "flow through an orifice" set of [[wikipedia:Bernoulli's_principle\|Bernouli's equations]] to attempt to calculate air mass.
			{{Warning Mild\|This is experimental/for educational purposes only.}}

	== Throttle effective % area (TPS -> % ~~tb1~~ area) ==		== Throttle effective % area (TPS ->% throttle boy area) ==

	~~PLACEHOLDER~~		This is the transfer function between TPS percentage and the throttle body area percentage.

	== Throttle Model Flow Discharge Coefficient ==		== Throttle Model Flow Discharge Coefficient ==

	~~PLACEHOLDER~~		This is the discharge coefficient.

Ogalic: /* Fuel Corrections */

2026-02-01T19:43:54Z

Fuel Corrections

Show changes

Ogalic: /* Injector Advance Assisted Tuning */

2026-02-01T19:10:33Z

Injector Advance Assisted Tuning

Show changes

Ogalic: /* Use simultaneous */

2026-02-01T16:40:27Z

Use simultaneous

← Older revision		Revision as of 16:40, 1 February 2026
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	==== Use simultaneous ====		==== Use simultaneous ====
	Enable simultaneous [[Config:~~Setup~~#~~Fuel strategy~~\|fuel mode]] into the scheduled switching.		Enable simultaneous [[Config:Fuel#Mode\|fuel mode]] into the scheduled switching.

	==== Cycles ====		==== Cycles ====

Ogalic: /* Use sequential */

2026-02-01T16:40:02Z

Use sequential

← Older revision		Revision as of 16:40, 1 February 2026
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	==== Use sequential ====		==== Use sequential ====
	Enable sequential [[Config:~~Setup~~#~~Fuel strategy~~\|fuel mode]] into the scheduled switching.		Enable sequential [[Config:Fuel#Mode\|fuel mode]] into the scheduled switching.

	==== Use batch ====		==== Use batch ====
	Enable batch [[Config:~~Setup~~#~~Fuel strategy~~\|fuel mode]] into the scheduled switching.		Enable batch [[Config:Fuel#Mode\|fuel mode]] into the scheduled switching.

	==== Use simultaneous ====		==== Use simultaneous ====

Ogalic: /* Injector deadtime assisted tuning */

2026-02-01T16:37:58Z

Injector deadtime assisted tuning

← Older revision		Revision as of 16:37, 1 February 2026
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	At first, the engine may struggle to stay running when the mode switch occurs. This is expected if your deadtime values are off, since those inaccuracies are usually already “hidden” in the VE table.		At first, the engine may struggle to stay running when the mode switch occurs. This is expected if your deadtime values are off, since those inaccuracies are usually already “hidden” in the VE table.

	If the engine goes too lean and won’t stay running, you can use the ~~'''~~[[Config:Fuel#Global Fuel Correction (1=100%)\|Global Fuel Correction]]~~'''~~ to richen the mixture enough to keep it alive.		If the engine goes too lean and won’t stay running, you can use the [[Config:Fuel#Global Fuel Correction (1=100%)\|Global Fuel Correction]] to richen the mixture enough to keep it alive.

	The Global Fuel Correction does not affect injector deadtime. It simply scales the overall fuel delivery, allowing you to keep the engine running while you dial in the correct deadtime values.		The Global Fuel Correction does not affect injector deadtime. It simply scales the overall fuel delivery, allowing you to keep the engine running while you dial in the correct deadtime values.

Ogalic: /* Injector deadtime assisted tuning */

2026-02-01T16:37:07Z

Injector deadtime assisted tuning

← Older revision		Revision as of 16:37, 1 February 2026
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	== Injector deadtime assisted tuning ==		== Injector deadtime assisted tuning ==

	'''~~Enable deadtime tuning cycle~~'''		epicEFI firmware includes an '''Injector Deadtime Tuning Tool''' that works by alternating between sequential injection and batch injection on a schedule.

	~~Deadtime Tuning: state~~		This method works because switching between these two modes changes the number of injection events per engine cycle. In batch mode, the injector fires '''twice per cycle''', while in sequential mode it fires '''once per cycle'''.

	~~'''Use~~ sequential~~'''~~		In both cases, the total amount of fuel delivered per cycle remains the same. The difference is that in batch mode the fuel is split into two injection events, whereas in sequential mode it is delivered in a single event. Since injector deadtime is added to every injection event, the total added deadtime per cycle differs between the two modes.

	~~Deadtime Tuning:~~ sequential en		If the deadtime values are not accurate, switching between batch and sequential injection will result in a measurable change in AFR at the exhaust.

	~~'''Use~~ batch~~'''~~		The epicEFI Injector Deadtime Tuning Assist automatically switches between sequential and batch modes on a set schedule, allowing you to log the AFR difference. You can then adjust the deadtime table until no AFR change is observed between the two modes, indicating that the injected fuel quantity is consistent in both cases.

	~~Deadtime Tuning~~: ~~batch en~~		It’s advisable to disable [[Config:Fuel#Short term fuel trim Setup\|short-term fuel trims]] and to run this test with the engine fully warmed up.

	~~'''Use simultaneous'''~~		At first, the engine may struggle to stay running when the mode switch occurs. This is expected if your deadtime values are off, since those inaccuracies are usually already “hidden” in the VE table.

	~~Deadtime Tunning~~: ~~simultaneous en~~		If the engine goes too lean and won’t stay running, you can use the '''[[Config:Fuel#Global Fuel Correction (1=100%)\|Global Fuel Correction]]''' to richen the mixture enough to keep it alive.

	~~'''Cycles'''~~		The Global Fuel Correction does not affect injector deadtime. It simply scales the overall fuel delivery, allowing you to keep the engine running while you dial in the correct deadtime values.

	~~Switch fuel strategy every this many cycles~~		==== Enable deadtime tuning cycle ====
			This is the master switch for the tool.

	~~'''Min RPM'''~~		==== Use sequential ====
			Enable sequential [[Config:Setup#Fuel strategy\|fuel mode]] into the scheduled switching.

	Minimum RPM for ~~Deadtime Asissted TUning~~		==== Use batch ====
			Enable batch [[Config:Setup#Fuel strategy\|fuel mode]] into the scheduled switching.

			==== Use simultaneous ====
			Enable simultaneous [[Config:Setup#Fuel strategy\|fuel mode]] into the scheduled switching.

			==== Cycles ====
			Switch fuel strategy every this many cycles of the engine.

			==== Min RPM ====
			Minimum RPM for the tool to run.

	== Injector Advance Assisted Tuning ==		== Injector Advance Assisted Tuning ==

Ogalic: /* Use small pulsewidth correction lookup curve */

2026-02-01T16:13:40Z

Use small pulsewidth correction lookup curve

← Older revision		Revision as of 16:13, 1 February 2026
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	Use the [[Config:Fuel#Primary Injector Small Pulsewidth Table\|small pulsewidth correction table]] to correct small injector pulse width behaviour.		Use the [[Config:Fuel#Primary Injector Small Pulsewidth Table\|small pulsewidth correction table]] to correct small injector pulse width behaviour.

	{{Warning_Mild\|This feature should only be needed if running very big injectors (>1500cc) and you have idle fueling problems. Do not use otherwise.}}		{{Warning_Mild\|This feature should only be needed if running very big injectors (>1500cc) and you have idle fueling problems, or you want to limit the minimum pulsewidth. Do not use otherwise.}}

	=== Fuel characteristics ===		=== Fuel characteristics ===
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	This is used to improve idle behaviour and other transient situations.		This is used to improve idle behaviour and other transient situations.

	{{Warning_Mild\|This feature should only be needed if running very big injectors (>1500cc) and you have idle fueling problems. Do not use otherwise.}}		{{Warning_Mild\|This feature should only be needed if running very big injectors (>1500cc) and you have idle fueling problems, or you want to limit the minimum pulsewidth. Do not use otherwise.}}

	== Primary Injector Small Pulsewth vs BatV multiplier ==		== Primary Injector Small Pulsewth vs BatV multiplier ==
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	This is the [[Config:Fuel#Use small pulsewidth correction lookup curve\|small pulsewidth correction]] in relation to battery voltage. Small pulse width behavour can change with battery voltage, and this can be used to correct that behaviour.		This is the [[Config:Fuel#Use small pulsewidth correction lookup curve\|small pulsewidth correction]] in relation to battery voltage. Small pulse width behavour can change with battery voltage, and this can be used to correct that behaviour.

	{{Warning_Mild\|This feature should only be needed if running very big injectors (>1500cc) and you have idle fueling problems. Do not use otherwise.}}		{{Warning_Mild\|This feature should only be needed if running very big injectors (>1500cc) and you have idle fueling problems, or you want to limit the minimum pulsewidth. Do not use otherwise.}}

	== Injector deadtime assisted tuning ==		== Injector deadtime assisted tuning ==