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Ok, I want to make a data base available for people to read about regarding what everything means in Hp tuners while you are tuning.
I am hoping that this will be stickied. I know I had, and still have lots of trouble going through my tunes and getting the car to do EXACTLY what I want it to do because I was not 100% clear on what each and every option in hp tuners does for us.
I would like if when you post follow this format:
Post the original Tab (engine, engine diag, trans, trans diag etc)
Post the sub tab
Sub heading if applicable,
and then the EXACT table.
You can ask questions related to info given, but I would like to stay on topic as much as possible...the idea behind this is I want to take all the data I get here and compile a little database for us in which we'll have a definition for every option on hp tuners (applicable to us). The less B.S I have to sift through to compile the info, the easier my life will be lol.
Also, Please DUMB this down as much as possible...Explain anything you define as if you were talking to someone that has absolutly Zilch experience/knowledge about tunning. As stuff is added I will edit my original post to reflect the changes...lets see how this goes.
Thanks guys.
I'll start:
ENGINE
General
EGR
Min IAT- this is the intake air temperature requirement that must be met in order for the EGR to be enabled. Below this temperature EGR is non functional.
Idle RPM
Target idle speed- This is the idle speed that your car attempts to achieve when the following conditions are met.
P/N (park Neutral) have the desired rpm settings in relative to the engine coolant temperature.
In Gear the same applies. This gives you the option of having two different desired idles for the same temperature, but dependant on if you are in Park/neutral or in gear.
Fuel Control
Stoich AFR- This is ideal air fuel ratio in which you will get the fullest combustion during cruise. Stoich from the factory is set at 14.7 (14.68), however the stoich afr changes based on what is added into your gasoline. The more ethanol present in your gas, the lower your stoich point will be. 0% ethanol in your gasoline yields a 14.7 afr as stoich, while 10% ethanol in your gasoline yields a 14.1 afr as stoich.
Injector Control
Flow rate vs KPA- This is your injector sizing table. It lets the pcm know what size fuel injectors are running in the car at any one given time. Since the fuel pressure in your car will change at different manifold vacuum pressures (AKA when under load such as at wide open throttle as opposed to at idle or cruise) the table allows you to adjust the “true” size of the injectors throughout that range.
Skew vs Cylinder- This allows you to skew the amount of fuel into any cylinder in your vehicle. You can either add more fuel to particular cylinders, or subtract fuel. This function is more for independent cylinder tuning.
Fuel Cutoff
RPM limits, Cutoff RPM Vs. Gear- You have both a cutoff and resume table here. Cutoff is the rpm threshold that the car will cut the fuel supply going to the cylinders for the respective scenarios: PN- Park/neutral, Reverse, In gear.
Resume is the point in which the car will begin to add fuel back to the cylinders once the cutoff has been initiated.
OL & CL
Delay- this table is used to set how much time the car delays in seconds after startup before it will enter into closed loop. The delay time is based upon your coolant temperature. Usually the warmer the coolant, the less of a delay time will be needed to enter into closed loop.
Coolant Temp- The coolant MUST reach this temperature IN ORDER to go into closed loop mode. This temperature must be met, regardless if the delay time above has passed.
Power Enrich
PE Enable, Delay Vs. TPS- This is a delay in seconds that you can implement to prevent entering PE mode after achieving a certain throttle position. Example- if you have PE set to come on at 25% throttle, but you accelerate at 25% throttle regularily, you may set a certain amount of seconds that would delay the car from going into power enrichment mode once you hit 25% throttle. The throttle increments go in 5% throttle increases. 0’s mean no delay in entering Power enrichment.
PE Enable TPS, Hot- We do not have a table for “cold” so this is not coolant temperature dependant. This table is where you set when you want power enrichment to be enabled via Throttle position. The numbers inputed into the table are Throtte %, and it is relative to your engine RPM. This allows you to set power enrichment at lower RPMs to come on at a higher throttle position, while you can still set power enrichment to enable at a lower throttle position at higher engine RPM’s.
Base AFR vs ECT- This table is what your default air fuel ratio will revert to when you enter Power enrichment mode. This table is based off of you engine coolant temperature. This allows you to set richer/leaner values for different weather inclements.
This base table is what will be used for the Add vs RPM, and Add vs TPS tables. You usually set this table richer then what your stoich afr is set at.
Add vs TPS- This table is used to LEAN out your power enrichment table at desired throttle positions. It will not allow you to put a negative number, therefore it does NOT allow you to add fuel.
Add vs RPM- This table is used to add fuel based on RPM when in power enrichment mode. The seconds that are present in the table are so that you can add more fuel (if you wish) the longer you stay within PE mode under a certain rpm load. This table adds fuel based on your base afr vs ECT table afr.
Spark Control
Main spark advance
High Octane- This is your spark advance timing that the car will attempt to utilize until it detects knock. If the car detects knock it will revert to the low octane table. Cylinder airmasss (g/cyl) is basically the load present on the engine. 0.92 cells would be hit at wide open throttle, while the ones in the middle will be hit at cruise.
Low octane- This is your spark advance timing that the car will attempt to utilize after it has detected knock. Again 0.92 cells would be hit at wide open throttle, while the ones in the middle will be hit at cruise.
Spark limiters
RPM Threshold- This is the RPM at which you will enable your rev limiter. At this threshold the pcm will cut the spark to the “commanded spark”
Commanded Spark- This is the specified spark that the pcm will cut to when the above RPM threshold has been met.
MPH vs Gear- When the following speeds have been reached in their respective gears, the “command spark” will be initiated to cut the timing (rev limiter)
Engine Diagnostics
Air flow
Maf sensor, Maf fail high- at this specified Hz frequency or higher, the pcm will automatically fail the Mass airflow sensor
DTC’s
- This table is a list of all possible engine light codes. You can set which ones will enable the engine light to come on, and when/how the light will come on.
SES enable- This determines whether or not the engine will check for the code.
0- you will get an engine code the first time a fault is detected.
1- You will get a fault code the second time this error is reported
2- No engine light will be displayed in the dash.
3- No code will be retrieved and no error reported.
I am hoping that this will be stickied. I know I had, and still have lots of trouble going through my tunes and getting the car to do EXACTLY what I want it to do because I was not 100% clear on what each and every option in hp tuners does for us.
I would like if when you post follow this format:
Post the original Tab (engine, engine diag, trans, trans diag etc)
Post the sub tab
Sub heading if applicable,
and then the EXACT table.
You can ask questions related to info given, but I would like to stay on topic as much as possible...the idea behind this is I want to take all the data I get here and compile a little database for us in which we'll have a definition for every option on hp tuners (applicable to us). The less B.S I have to sift through to compile the info, the easier my life will be lol.
Also, Please DUMB this down as much as possible...Explain anything you define as if you were talking to someone that has absolutly Zilch experience/knowledge about tunning. As stuff is added I will edit my original post to reflect the changes...lets see how this goes.
Thanks guys.
I'll start:
ENGINE
General
EGR
Min IAT- this is the intake air temperature requirement that must be met in order for the EGR to be enabled. Below this temperature EGR is non functional.
Idle RPM
Target idle speed- This is the idle speed that your car attempts to achieve when the following conditions are met.
P/N (park Neutral) have the desired rpm settings in relative to the engine coolant temperature.
In Gear the same applies. This gives you the option of having two different desired idles for the same temperature, but dependant on if you are in Park/neutral or in gear.
Fuel Control
Stoich AFR- This is ideal air fuel ratio in which you will get the fullest combustion during cruise. Stoich from the factory is set at 14.7 (14.68), however the stoich afr changes based on what is added into your gasoline. The more ethanol present in your gas, the lower your stoich point will be. 0% ethanol in your gasoline yields a 14.7 afr as stoich, while 10% ethanol in your gasoline yields a 14.1 afr as stoich.
Injector Control
Flow rate vs KPA- This is your injector sizing table. It lets the pcm know what size fuel injectors are running in the car at any one given time. Since the fuel pressure in your car will change at different manifold vacuum pressures (AKA when under load such as at wide open throttle as opposed to at idle or cruise) the table allows you to adjust the “true” size of the injectors throughout that range.
Skew vs Cylinder- This allows you to skew the amount of fuel into any cylinder in your vehicle. You can either add more fuel to particular cylinders, or subtract fuel. This function is more for independent cylinder tuning.
Fuel Cutoff
RPM limits, Cutoff RPM Vs. Gear- You have both a cutoff and resume table here. Cutoff is the rpm threshold that the car will cut the fuel supply going to the cylinders for the respective scenarios: PN- Park/neutral, Reverse, In gear.
Resume is the point in which the car will begin to add fuel back to the cylinders once the cutoff has been initiated.
OL & CL
Delay- this table is used to set how much time the car delays in seconds after startup before it will enter into closed loop. The delay time is based upon your coolant temperature. Usually the warmer the coolant, the less of a delay time will be needed to enter into closed loop.
Coolant Temp- The coolant MUST reach this temperature IN ORDER to go into closed loop mode. This temperature must be met, regardless if the delay time above has passed.
Power Enrich
PE Enable, Delay Vs. TPS- This is a delay in seconds that you can implement to prevent entering PE mode after achieving a certain throttle position. Example- if you have PE set to come on at 25% throttle, but you accelerate at 25% throttle regularily, you may set a certain amount of seconds that would delay the car from going into power enrichment mode once you hit 25% throttle. The throttle increments go in 5% throttle increases. 0’s mean no delay in entering Power enrichment.
PE Enable TPS, Hot- We do not have a table for “cold” so this is not coolant temperature dependant. This table is where you set when you want power enrichment to be enabled via Throttle position. The numbers inputed into the table are Throtte %, and it is relative to your engine RPM. This allows you to set power enrichment at lower RPMs to come on at a higher throttle position, while you can still set power enrichment to enable at a lower throttle position at higher engine RPM’s.
Base AFR vs ECT- This table is what your default air fuel ratio will revert to when you enter Power enrichment mode. This table is based off of you engine coolant temperature. This allows you to set richer/leaner values for different weather inclements.
This base table is what will be used for the Add vs RPM, and Add vs TPS tables. You usually set this table richer then what your stoich afr is set at.
Add vs TPS- This table is used to LEAN out your power enrichment table at desired throttle positions. It will not allow you to put a negative number, therefore it does NOT allow you to add fuel.
Add vs RPM- This table is used to add fuel based on RPM when in power enrichment mode. The seconds that are present in the table are so that you can add more fuel (if you wish) the longer you stay within PE mode under a certain rpm load. This table adds fuel based on your base afr vs ECT table afr.
Spark Control
Main spark advance
High Octane- This is your spark advance timing that the car will attempt to utilize until it detects knock. If the car detects knock it will revert to the low octane table. Cylinder airmasss (g/cyl) is basically the load present on the engine. 0.92 cells would be hit at wide open throttle, while the ones in the middle will be hit at cruise.
Low octane- This is your spark advance timing that the car will attempt to utilize after it has detected knock. Again 0.92 cells would be hit at wide open throttle, while the ones in the middle will be hit at cruise.
Spark limiters
RPM Threshold- This is the RPM at which you will enable your rev limiter. At this threshold the pcm will cut the spark to the “commanded spark”
Commanded Spark- This is the specified spark that the pcm will cut to when the above RPM threshold has been met.
MPH vs Gear- When the following speeds have been reached in their respective gears, the “command spark” will be initiated to cut the timing (rev limiter)
Engine Diagnostics
Air flow
Maf sensor, Maf fail high- at this specified Hz frequency or higher, the pcm will automatically fail the Mass airflow sensor
DTC’s
- This table is a list of all possible engine light codes. You can set which ones will enable the engine light to come on, and when/how the light will come on.
SES enable- This determines whether or not the engine will check for the code.
0- you will get an engine code the first time a fault is detected.
1- You will get a fault code the second time this error is reported
2- No engine light will be displayed in the dash.
3- No code will be retrieved and no error reported.
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