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1999Porsche911

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Everything posted by 1999Porsche911

  1. 1999Porsche911
    When I said "uncalibrated" I was referring the the airflow may be out of the normal range for the MAF. This is NOT a problem that cannot be corrected. Without you being able to read the MAF and O2 levels, we are making alot of assumptions. The only thing that is different with your new induction system is the replacement of the stock air chamber with a cone filter. What has this changed. Two things...less restriction on air flow into the intake and you have shortened the length the air flows before it is read by the MAF. Do you have a screen on the intake between the filter and MAF? This will help reduce air turbulance as it flows past the MAF. Like I said, without a scan tool, the first thing I would do is reset the computer and reduce the airflow of the filter by covering part of it so air cannot flow through. I would cover like a third of the filter CLOSEST to the MAF by rapping it in cellophane. If this eliminates the CEL, then I would test it by removing the cellophane and installing a screen over the tube between the filter and the MAF and test again. If blocking some of the filters flow fixes it, then the permanent fix is easy. Let me know how the test comes out. Don't forget to rule out a vacuum leak. How is your idle?
  2. 1999Porsche911
    Try this: Cover half of the cone filter with tape, plastic or something else air tight and try running it that way. If the light doesn't come on, you have isolated the problem as having too much air flow (or too turbulant) past the "uncalibrated" MAF. Let me know and we can try to fix this.
  3. 1999Porsche911
    The car runs fine on 91 octane. Going to 100 would not gain you anything but less money in your wallet, unless you have modified the engine. Raising the octane to 93 using a blend of 100 octane and 91 octane may provide you slightly better performance, but I am not sure if you would really notice. If you're curious, it won't do any harm to try, but for a NA engine, I am sure you will see that it is a waste of money.
  4. 1999Porsche911
    I would love to see a picture or a diagram of the setup to see if it's something obvious.
  5. 1999Porsche911
    I would forget the chin. I removed mine since it was too low. Even straddling a dead squirrel in the road would bang it.
  6. 1999Porsche911
    What is the AireTech Cold air pipe? Do you have a pic of the installation? Without knowing the setup, It appears that the MAF is calculating a larger volume of air therefore telling the computer to boost the amount of fuel being injected. The O2 sensors are then supposed to adjust the amount of fuel injected based on what they read. Apparently, the adjustment is too much. Now, if you had an OBD reader, you could look at what the MAF is reading and what the O2 sensors are reading. The secondary O2's will be showing a high reading if you are running rich. I would reset the computer and let it relearn the setup. Also, make sure that there is no vacuum leak. If that does not work, install a 270 ohm resister in the voltage line on the cable of the MAF. This will lower the amount of air the MAF tells the computer it has, but WILL NOT reduce the amount of air entering the system. The injectors will open for a less amount of time and the O2's should be able to handle any adjustment.
  7. 1999Porsche911
    Check out the Bridgestone RE750. Great tire with the best street traction I have every experienced. That's all I buy.
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