Question about 1997 Porsche 911

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Motronic Event Sequence

I replaced the battery in my Porsche 911 (993 series), clearing the Motronic codes. Now I need to get my emissions check completed but the codes are reading ''not ready''. Does anyone know what sequence of cold starts, etc. the Motronic needs to compute all of the values?

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  • kwgiven May 15, 2009

    Thanks for the reply, but I am speaking of the computations the Motronic does for various emissions tests. If I clear everything I will be back where I started. I was hoping to discover what cycles the engineers expected the car to perform in order for all of the computations to be completed so the EPA can read the results.

  • kwgiven May 15, 2009

    I am looking for someone who knows what sequence of events, e.g., how many cold starts, etc. are required for the Motronic in my 1997 Porsche 911 to successfully compute all of the various emissions checks and values. Now I am just driving it for errands and so on and going for emissions tests by trial and error.

  • kwgiven May 15, 2009

    No faults are being displayed. That isn't the problem. I have been driving it off and on for a couple of weeks - several trips of varying length and speed. 3 of the 7 fields have filled, but I was hoping someone knew what the Motronic is looking for so I could expedite the process.

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You can go to your public library and they have the automotive shops mechanic online software called AllData. It is the best auto technician database available today. You can print out specific troubleshooting procedures, diagrams, step-by-step istructions, and soforth. The typical person cannot afford to pay for this service just automotive shops, etc... that is why the public library made it available to everyone and for free to view and print out material. This should Fixya! Good Luck!

Please rate my assistance.

Posted on May 16, 2009

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Well what i am about to pen down is a sort of short-cut that works 8 out 10 times so you could give it a try:

To review the FAULT CODES from the ECU memory use the following procedure:

1) Turn the ignition switch to the 'engine run' position.
2) Depress the gas pedal to the floor 5 times.

The CHECK ENGINE light will blink out the FAULT CODES starting with the lowest number first. These FAULT CODES consist of 4 digits each separated by a short pause

(ie. blink pause blink blink pause blink pause blink translates as 1 2 1 1)...........sodeep

Posted on May 16, 2009

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It has to be running for a day as the battery starts operating with the computer device.the battery gets detected and the faults will be cleared.

Posted on May 15, 2009

  • charlymonty May 16, 2009

    check out the compute wires as it should work in couple of weeks time for sure.its not the case of reset.

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Hi kwgiven.

you may use a Durametric software to clear / reset your Motronic Codes and set it to ready status.

here is where you can get it.

http://www.durametric.com/modelfeaturematrix.aspx

hope this helps.

regards,

voodoo

Posted on May 15, 2009

  • marlon john madrid
    marlon john madrid May 15, 2009

    hi there

    the duremetric does have those kinds of functions. just open up the link and it will give you an over view of the features the software has.

    it may not have the exact feature we need but it will go through and give the information you are looking for.

    regards


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