Cobb AccessPORT Discussion
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Joined: Jul 2009
Posts: 205
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From: Canada, UAE, Philippines.
first of all id like to applogize now
cant read through all 226 pages and search showed up nothing useful
i noticed that the obd2 is still powering the cobb with the ignition off, is there a timer on the car or the cobb?
as id like to modify the obd2 mount and have the cobb utalised at all times when the vehicle is running.
if not i guess i could find a way to put a relay to supply the unit with power when the ign is on
thanks and sorry if this has been asked 100 times
cant read through all 226 pages and search showed up nothing useful
i noticed that the obd2 is still powering the cobb with the ignition off, is there a timer on the car or the cobb?
as id like to modify the obd2 mount and have the cobb utalised at all times when the vehicle is running.
if not i guess i could find a way to put a relay to supply the unit with power when the ign is on
thanks and sorry if this has been asked 100 times
first of all id like to applogize now
cant read through all 226 pages and search showed up nothing useful
i noticed that the obd2 is still powering the cobb with the ignition off, is there a timer on the car or the cobb?
as id like to modify the obd2 mount and have the cobb utalised at all times when the vehicle is running.
if not i guess i could find a way to put a relay to supply the unit with power when the ign is on
thanks and sorry if this has been asked 100 times
cant read through all 226 pages and search showed up nothing useful
i noticed that the obd2 is still powering the cobb with the ignition off, is there a timer on the car or the cobb?
as id like to modify the obd2 mount and have the cobb utalised at all times when the vehicle is running.
if not i guess i could find a way to put a relay to supply the unit with power when the ign is on
thanks and sorry if this has been asked 100 times
That way you can turn off power to the OBD-II whenever you like.
Right now I just unplug the AP whenever I turn off the car.
Registered User
Joined: Jan 2009
Posts: 553
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From: laguna hills, CA
^^ u need to read man. Go to the first page an click the links. I don't want u to get flamed. Lol. It basically makes ur mods all
function as one great system along with many other attributes
function as one great system along with many other attributes
Quick question - masking codes with the Cobb. Does it mask it permanently? If the code occured again, would the AP mask it? Or do you have to continuously re-mask the code whenever it occured?
A few weeks back, my dashboard randomly fritzed itself, and threw up a few codes (one of which was bad electrical connection). I checked my battery(wiggled the battery connectors also), checked the fuses, found nothing and proceeded to clear the codes. They haven't occurred again.
Additional note - it was raining that day, and I was idling at a driveway waiting for my friend when it happened.
The car was running perfectly fine even through the electrical problems. I monitored my AFR, my rpms, everything through the AP. Even my radio worked. It was only the dashboard that fritzed. So to return to the question - when I masked the codes that popped up, is it masked forever or just that one time?
TL;DR people - read the bold
A few weeks back, my dashboard randomly fritzed itself, and threw up a few codes (one of which was bad electrical connection). I checked my battery(wiggled the battery connectors also), checked the fuses, found nothing and proceeded to clear the codes. They haven't occurred again.
Additional note - it was raining that day, and I was idling at a driveway waiting for my friend when it happened.
The car was running perfectly fine even through the electrical problems. I monitored my AFR, my rpms, everything through the AP. Even my radio worked. It was only the dashboard that fritzed. So to return to the question - when I masked the codes that popped up, is it masked forever or just that one time?
TL;DR people - read the bold
Last edited by JinDesu; Feb 18, 2010 at 08:44 AM.
Woops - I guess I didn't know there was a difference between mask and clear. I cleared them, in that case.
Alright - if that's the case, I'll chalk that incident to a random electrical event (probably due to the rain and my recent puddle lights install), and the fact that it hasn't popped up again is a good thing. Thanks Kane!
Alright - if that's the case, I'll chalk that incident to a random electrical event (probably due to the rain and my recent puddle lights install), and the fact that it hasn't popped up again is a good thing. Thanks Kane!
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Joined: Jun 2009
Posts: 62
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hey, guys. random question and i promise i've used the search button. haha! wouldn't the climate matter in tuning? because the air temp and components is obviously different for various areas. with that in mind, how will MazdaManiac take that into account? or that wouldn't matter too much?
hey, guys. random question and i promise i've used the search button. haha! wouldn't the climate matter in tuning? because the air temp and components is obviously different for various areas. with that in mind, how will MazdaManiac take that into account? or that wouldn't matter too much?
MAF vs MAP Tuning
There are two basic types of EMS’ out there today (excluding the ones that tune by Volumetric Efficiency). There are those that use a Mass Airflow Sensor (MAF) and others that use a Manifold Absolute Pressure Sensor (MAP). Some cars, like an RX8+e-Manage use both a MAF with a piggyback EMS that uses MAP. There are different tuning set-ups depending on what type of EMS the vehicle has.
MAF = example - Cobb AP (in some cases); Maps are often in Load and RPM. This type of EMS measures the mass of air entering the motor by using a heated sensor which reads the amount of airflow being drawn into the motor and converts this reading into a voltage usually in the scale of Volts, or in some cars Hertz. This is called a MAF sensor. This means your vehicle is going to be tuned in Load % or Calculated Load%. The scales on MAF vehicles use some derivative of Load as there is no pressure sensor.
MAF Sensor EMS’ calculate the Load on the motor by taking the RPM and the Mass of Air into the motor to determine the Load %. It does this by determining the total volume of air the motor could breathe at the specified RPM (Engine Displacement * RPM) and dividing that by the Mass of Air the motor is actually breathing. A 3.0 Liter Engine at 2000 RPM is capable of breathing 6000 Liters of Air a minute; but the MAF only measures 3000 Liters of Air, is said to be at 50% load. Tuning a boosted motor with a MAF based tunable EMS, the Load scale is going to exceed 1.00 or exceed 100% (see Power Adders for Dummies Post for more on Load and VE%).
MAP = example - Apexi PFC; Pressure Based Tuning
This type of EMS uses the Pressure of the Intake Manifold combined with the Air Temperature to estimate the Mass of Air into the motor. This is currently the most common type of Tunable EMS. Typically, the Base Map is set up just by Pressure and RPM. There is a separate map for temperature changes as a modifier to the base fuel map. Baseline will be giving you the information to plug into the base map. The scale of a MAP based EMS may also be in Load.
The type of EMS in the vehicle needs to be known in order to set up the Manifold Scale correctly. It will either be in Load (KPa, or Percent), Pressure (PSI) or Voltage (V). Some MAP sensors will convert the reading into a Voltage similar to some MAF sensors, this occurs with some versions of HP Tuners.
Ultimately, these different EMS’ do the same thing; figure the Partial Pressure of Oxygen in the motor to calculate the amount of fuel to inject. While the set-up will be different, the tuning process is the same.
There are two basic types of EMS’ out there today (excluding the ones that tune by Volumetric Efficiency). There are those that use a Mass Airflow Sensor (MAF) and others that use a Manifold Absolute Pressure Sensor (MAP). Some cars, like an RX8+e-Manage use both a MAF with a piggyback EMS that uses MAP. There are different tuning set-ups depending on what type of EMS the vehicle has.
MAF = example - Cobb AP (in some cases); Maps are often in Load and RPM. This type of EMS measures the mass of air entering the motor by using a heated sensor which reads the amount of airflow being drawn into the motor and converts this reading into a voltage usually in the scale of Volts, or in some cars Hertz. This is called a MAF sensor. This means your vehicle is going to be tuned in Load % or Calculated Load%. The scales on MAF vehicles use some derivative of Load as there is no pressure sensor.
MAF Sensor EMS’ calculate the Load on the motor by taking the RPM and the Mass of Air into the motor to determine the Load %. It does this by determining the total volume of air the motor could breathe at the specified RPM (Engine Displacement * RPM) and dividing that by the Mass of Air the motor is actually breathing. A 3.0 Liter Engine at 2000 RPM is capable of breathing 6000 Liters of Air a minute; but the MAF only measures 3000 Liters of Air, is said to be at 50% load. Tuning a boosted motor with a MAF based tunable EMS, the Load scale is going to exceed 1.00 or exceed 100% (see Power Adders for Dummies Post for more on Load and VE%).
MAP = example - Apexi PFC; Pressure Based Tuning
This type of EMS uses the Pressure of the Intake Manifold combined with the Air Temperature to estimate the Mass of Air into the motor. This is currently the most common type of Tunable EMS. Typically, the Base Map is set up just by Pressure and RPM. There is a separate map for temperature changes as a modifier to the base fuel map. Baseline will be giving you the information to plug into the base map. The scale of a MAP based EMS may also be in Load.
The type of EMS in the vehicle needs to be known in order to set up the Manifold Scale correctly. It will either be in Load (KPa, or Percent), Pressure (PSI) or Voltage (V). Some MAP sensors will convert the reading into a Voltage similar to some MAF sensors, this occurs with some versions of HP Tuners.
Ultimately, these different EMS’ do the same thing; figure the Partial Pressure of Oxygen in the motor to calculate the amount of fuel to inject. While the set-up will be different, the tuning process is the same.
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Joined: Mar 2007
Posts: 417
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wanna ask:
After loaded with base map that come with my AP, the idling to 5k rpm AFR maintain at 14.x . But when I slowly bring up the rpm and then release, the AFR will fly to 20.x - 21.x as soon as the throttle released. Is that normal?
After loaded with base map that come with my AP, the idling to 5k rpm AFR maintain at 14.x . But when I slowly bring up the rpm and then release, the AFR will fly to 20.x - 21.x as soon as the throttle released. Is that normal?
What "base map" are you talking about?
It is normal for the AFR to go to full lean on over-run/decel.
