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2000+ 456m Smog

Discussion in 'Technical Q&A' started by Eaven marcum, Apr 21, 2019.

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  1. Eaven marcum

    Eaven marcum Rookie

    Feb 16, 2019
    4
    San Francisco Bay Area
    Full Name:
    Eaven Marcum
    Hello All, PLEASE HELP!!! :)

    I hope I'm posting this in the correct area. I've done an extensive search and turned up nothing. Long story short - Failed smog due to Air Injection System (monitor not ready). I have the drive cycle on a piece of paper and have followed instructions for about 3 months now.

    The way the drive cycle is written leans towards a manual transmission car. With mine being a 456m-gta it's hard to mimic what the drive cycle wants.

    Any first hand experience with smog failures due to air monitor? Some people say software, some people say new ecu's, some people say drive it. I personally would love to find someone to hack the ECU and change the software to read READY for the air injection system so it's never an issue again.

    I am located in the San Francisco Bay Area and if anyone in the area has either had to deal with this issue, or knows who can fix it I'd love to talk to you. THANKS.
     
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  3. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,182
    Berkeley, CA
    Full Name:
    Brian Brown
    When I worked at the dealership (San Francisco Ferrari), we had two 2000 456GTMA in at the same time for the same issue. Many hours were spent testing the air injection systems (which worked fine), Testing the inputs of the oxygen sensors (which is how the OBDII system knows that the air injection is functioning, by seeing the extra oxygen in the exhaust when the air injection pump run). There was much communication with Ferrari Technical assistance, who were of no help and did not even know that the 456GTMA has an automatic transmission (as they were not old enough to drive when this car came out).
    Finally both cars had to be taken to the referee station with all of the documentation that the air injection monitors would not set in order to get an exemption.
    I don't know if the owner will have to do this every two years, but I have a feeling they will.
     
  4. Rifledriver

    Rifledriver Two Time F1 World Champ

    Apr 29, 2004
    27,086
    Austin TX
    Full Name:
    Brian Crall
    Might want to have a conversation with ECU Doctors in Florida and see if they can or if they know of anyone who can help out with the monitors.As the cars age it is getting to be a real problem. We just did not have these issues in all but a few well known scenarios until the cars got older.

    Bosch is not the company it once was.
     
  5. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,182
    Berkeley, CA
    Full Name:
    Brian Brown
    Ferrari and Bosch have a tenuous relationship. If you ask Ferrari what are the parameters or inputs that cause a fault to be set in an ECU or what the ECU needs to see for an emissions monitor to set, they cannot tell you, as they don't know.
    Typically the monitor for the air injection system is set when the car is started from cold and then idles for five minutes. Depending on the ambient air temperature, the air injection pump will run for a certain amount of time. With a Ferrari specific diagnostic computer that has a graphing function, you can watch the air injection pump on signal along with the front oxygen sensor signal. After a cold start, the air injection pump should run (you will hear a high pitched fan noise, like a vacuum cleaner motor), and you can watch the oxygen sensor voltage start out at .5v and then drop lower and lower to .2v to .1v as the air injection pump introduces oxygen into the exhaust system, driving the oxygen sensor towards a lean signal. As soon as the engine reaches a certain coolant temperature, the air injection pump will stop running, and the oxygen sensor signal will start to cycle back a forth across the .5v threshold for a stoichiometric fuel mixture (going into closed loop mode). With some cars, this is all that is required to set the air injection monitor.
    If the ambient temperature is too high (above 100 Degrees F or so), then the air injection pump may be outside of its parameters for running, so it will not run from a cold start, and the air injection monitor will not set. Apparently some auto manufacturers have the air injection pump run briefly at other times during the drive cycle, so that the ecu will see a lean mixture and know that the air injection system is working and then will set its monitor. Ferrari will not say if they do this on any of their vehicles.
     
  6. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,182
    Berkeley, CA
    Full Name:
    Brian Brown
    There are tuners that can reflash your control units to alter the fuel mixture and timing maps. I am sure that they can alter the ODB II monitors as well. I worked on a 360 Modena that had a turbo kit installed and the motronic ECUs reflashed. They removed many of the things that would have caused the check engine light to come on along with some of the OBD II emissions monitors. The only issue was that when read with a scanner, the OBD II monitors were not displayed as set, they just did not display anything at all.
    You are going to have to find someone who is very smart in terms of OBD II tuning in order to just set the air injection monitors. such as Mitchell McKee of COBB Tuning or M-Engineering
     
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  8. Rifledriver

    Rifledriver Two Time F1 World Champ

    Apr 29, 2004
    27,086
    Austin TX
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    Brian Crall
    Exactly the problem.

    I do understand that air pump function is done during a steady state cruise. It will go on very briefly and Motronic looks for an O2 reaction.
     
  9. ferraridriver

    ferraridriver F1 Rookie
    Rossa Subscribed

    Aug 8, 2002
    4,035
    Bay Area Calif.
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    Dave
    I have this problem with a 2000 550, secondary air monitor incomplete. After much discussion I took the car to Ferrari of SF and paid the mandatory $650.00 so I could take it to the referee station. I got a one time exemption and was told that it was ONLY one time. I will NOT be able to get another exemption. If the situation continues I will NOT be able to register the car in California. No if's or but's about it, that's it. I would have to sell the car out of state.

    I suspect the problem is in the software of the ECU, some unusual combination of inputs has rendered the secondary air monitor incomplete. What I don't understand is why a reflash of the ECU will not cure the problem.


    I have a test light wired into the air pump relay so I can see when the pump runs. So far neither myself or fat billy bob have seen the pump run other than a cold start.
    I would love to have someone who can clear codes/reset battery then reset all the monitors test with my light to see if the pump really does run during the drive cycle or just during a cold start.

    The fact that Ferrari cares not a hoot about this comes as no surprise.

    I wonder about a class action suit of FNA? There are certainly lots of horror stories of everything working but the monitor incomplete.
     
  10. Rifledriver

    Rifledriver Two Time F1 World Champ

    Apr 29, 2004
    27,086
    Austin TX
    Full Name:
    Brian Crall
    I think you'll get more satisfaction sooner for far less money by finding someone who can modify the ECU so it shows all monitors ready all the time.


    I agree with Brian. Bosch really doesn't care what kind of issues Ferrari has with their stuff. I once had Bosch's guru for engine management on the phone over a CEL that wouldn't go away. His serious response was to remove the light bulb. He didn't give a **** that it wasn't an acceptable fix for the problem.
     
  11. ferraridriver

    ferraridriver F1 Rookie
    Rossa Subscribed

    Aug 8, 2002
    4,035
    Bay Area Calif.
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    Dave
    I would love to do just that, if anyone knows of such a wizard please let me know how to contact them

    Brian, a question, Do both ECU's store codes or just one and if one which one?
    Would switching ECU's side to side have any effect?
    Thanks, Dave
     
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  13. Rifledriver

    Rifledriver Two Time F1 World Champ

    Apr 29, 2004
    27,086
    Austin TX
    Full Name:
    Brian Crall
    Give it a try. Only one interacts with the air inj system. As I recall both store the code but only the right tells the system to operate.


    I know a guy in So Cal who might be able to help. I'll get in touch with him.
     
  14. Mirek

    Mirek Formula Junior

    Oct 20, 2019
    348
    Los Angeles, CA
    Full Name:
    J,Mirek
    I know a guy in So-Cal too if needed.
     
  15. Redneck Slim

    Redneck Slim Formula Junior
    Silver Subscribed

    Mar 10, 2011
    978
    Palo Alto,CA,USA
    Full Name:
    Walt Kimball
    The May 2020 issue of FORZA magazine has an article about this issue,especially the secondary air injection monitor. The tech who wrote the article is in the Bay Area and can deal with it.
     

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