Difference's and Pro's and Con's
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This is a discussion on Difference's and Pro's and Con's within the Tuning: Electronic Engine Management forums, part of the Tech & Modifying & General Repairs category; I have been looking into getting a Cobb AccessPort for my 02 WRX, i have been using a friends OBD-II ...

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    Registered User SubaruDewed's Avatar
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    Difference's and Pro's and Con's

    I have been looking into getting a Cobb AccessPort for my 02 WRX, i have been using a friends OBD-II reader to constantly delete a CEL that comes up since i replaced my old radiator and thermostat, anyway thats off the subject. I recently saw a Actron CP9185 for half the price of the Accessport. Now i know the OBD-II reader will not do near everything the Accessport will, but my question is, will the accessport do what this device does? would it be a waste of money to by this and then by the accessport also?

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    Sammich Makin' Pwincess wrxtreme06's Avatar
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    An access port not only reads/clears codes but its a handheld tuning device also.

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    Re: Difference's and Pro's and Con's

    I'd post that code and get that fixed first... just my 2c.

    Posted from a fone.

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    Quote Originally Posted by UEDan View Post
    I'd post that code and get that fixed first... just my 2c.

    Posted from a fone.
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    Registered User SubaruDewed's Avatar
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    Quote Originally Posted by Mikie13 View Post
    Trudat yo!
    I know exactly what the code is, it is PO128 which says to check thermostat/cooling system, the reason this pops up is because i replaced my stock radiator w/ a fully aluminum race radiator and a lower temp thermostat, so in turn my engine doesnt hit the required temp in the required amount of time, which is what was expected with the installation of these parts. This is not the problem which is why i didnt go into it. I do plan on doing some tuning to the car, my whole question was will the tuning tool do everything the OBD-II will or would i benefit from buying both?

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    Quote Originally Posted by SubaruDewed View Post
    my whole question was will the tuning tool do everything the OBD-II will or would i benefit from buying both?
    In that case, the Accessport will do everything you need. It's an OBD-II/CANBUS reader + tuning tool all in one. No sense in getting both devices.
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    Quote Originally Posted by SubaruDewed View Post
    This is not the problem which is why i didnt go into it.


    Just as long as you do understand that it IS a problem and that you should put the correct temp thermostat in your car to prevent further damage to your engine. Some people actually think it's good for their car to run under temp, which is of course is not the case.

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    Registered User SubaruDewed's Avatar
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    Quote Originally Posted by MainFrame View Post
    Just as long as you do understand that it IS a problem and that you should put the correct temp thermostat in your car to prevent further damage to your engine. Some people actually think it's good for their car to run under temp, which is of course is not the case.
    Not the problem thanks. For a turbo charged car that runs over normal temp to begin with an produces more NOx because of those higher temps a lower temp is better for the car, and emissions, since it wont be as low to effect the HC or CO2 readings.
    Last edited by SubaruDewed; 02-15-2013 at 09:33 PM.

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    Re: Difference's and Pro's and Con's

    Quote Originally Posted by SubaruDewed View Post
    Not the problem thanks. For a turbo charged car that runs over normal temp to begin with an produces more NOx because of those higher temps a lower temp is better for the car, and emissions, since it wont be as low to effect the HC or CO2 readings.
    That is not at all true. Your car has an operating temperature for a reason. You're familiar with CTE of materials? The motor's tolerances are optimum at the operating temperature. At a lower temperature, the piston rings have not fully expanded to the match the cylinders, and the bearings have not expanded to fill the crank pins. Put it this way: if a 160 degree thermostat has only positives and no cons, why had Subaru not put one into the car from the factory?

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    Difference's and Pro's and Con's

    Wait -- you've measured reduced emissions after removing the thermostat and replacing with a lower temp unit? How much lower were the NOx data? What happened to CO? Same ambient temps? Post the data if you have them, I'm all for reduced emissions.
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    OMG WTF MainFrame's Avatar
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    Quote Originally Posted by SubaruDewed View Post
    Not the problem thanks. For a turbo charged car that runs over normal temp to begin with an produces more NOx because of those higher temps a lower temp is better for the car, and emissions, since it wont be as low to effect the HC or CO2 readings.

    How high over normal temp was your car running? I would definitely investigate the cause of the overheating rather than just trying to put a band aid on it (lower temp thermostat). Generally, a lower temp thermostat shouldn't have any effect on overheating anyways (unless the cause was a faulty thermostat in the first place). For what it's worth, optimal operating temperature for a WRX/STi is anywhere between 190F and 210F.. if your engine is not reaching those temperatures in a timely manner, then it is undergoing unnecessary damage.

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    Registered User SubaruDewed's Avatar
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    wow this got off topic fast, and mostly my fault with the wording of some of what i posted. My car was never overheating, i cracked my stock radiator and replaced it with an all aluminum radiator and a Grimmspeed Thermostat. That thermostat does not run my car under normal operating temperatures, i know this because my temp gauge will still go up to the "normal" temp spot and not go over. i do believe it does take longer, with the combination of the better radiator and thermostat, to reach that this temp, especially early in the morning on the freeway, but not effected to much during mid day in town. I believe this to be due to how much more air flow im getting while on the freeway and how cold it is outside (30-50) compared to stop and go in town at around 70-90 degrees outside. Anyway, Thank you for the answer i was looking for Rambo.

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    Difference's and Pro's and Con's

    If u strictly want a code reader buy one off newegg for $20.

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    Moderator Donkey's Avatar
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    The AP is defiantly not a true OBDII scanner. Can't count how many times some one has posted about the AP displaying "?????" for the code.
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