Why am I burning oil????? | Page 2 | FerrariChat
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Why am I burning oil?????

Discussion in '348/355' started by Joshieburger, Dec 1, 2015.

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  1. Andy 355

    Andy 355 Formula Junior

    Jun 2, 2013
    434
    Sydney
    #26 Andy 355, Dec 5, 2015
    Does sound more and more like rings. Excess fuel will wash the cylinder walls and the rings wont last. Compression rings and oil control rings do completely different jobs... Good luck with it mate.
     
  2. Joshieburger

    Joshieburger Karting

    Aug 21, 2015
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    Oahu, Hawaii
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    Josh
    #27 Joshieburger, Dec 5, 2015
    So i replaced the coolant temp sensors, and unplugged the cat temp ECUs (since the thermocouples dont go into anything), restarted and STILL got codes 1112, 4121, and 1121 (checked with engine NOT running, hense the RPM sensor code). So why after clearing the codes, and even resetting the ecus, unplugged the battery, even grounded the positive cable to remove all excess voltage, why do i still get all the same codes? Brand new temp sensors, should clear that code, and i read on here that unplugging the cat temp ecus would stop that code. Is there something im missing in resetting the CEL's? They arent supposed to store after a battery disconnect, but they are still there.
     
  3. WPOZZZ

    WPOZZZ F1 Veteran

    Aug 22, 2012
    6,508
    Honolulu, HI
    #28 WPOZZZ, Dec 6, 2015
    If the cat temp ecus are unplugged, you will throw a code. With all the anomalies you are experiencing with this car, have you checked the sensor wires for voltage?
     
  4. Joshieburger

    Joshieburger Karting

    Aug 21, 2015
    162
    Oahu, Hawaii
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    Josh
    #29 Joshieburger, Dec 6, 2015
    Is there a breakdown and pin diagram easily accessible somewhere on fchat? Thats a good idea.
     
  5. WPOZZZ

    WPOZZZ F1 Veteran

    Aug 22, 2012
    6,508
    Honolulu, HI
    #30 WPOZZZ, Dec 6, 2015
    Since you did a compression test, did you also do a leak down test? That would be most telling if you had significant down numbers.
     
  6. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,795
    Redondo Beach, CA
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    Bruce Bogart
    #31 plugzit, Dec 6, 2015
    With all compression numbers in such a tight range, what would you expect to learn from a leakage test?
     
  7. Joshieburger

    Joshieburger Karting

    Aug 21, 2015
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    Oahu, Hawaii
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    #32 Joshieburger, Dec 6, 2015
    I would have only been inclined to do a leakdown if i had a cylinder with low compression. But all of my cylinders were 195psi
     
  8. Joshieburger

    Joshieburger Karting

    Aug 21, 2015
    162
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    #33 Joshieburger, Dec 8, 2015
    Not sure why i cant find an electrical schematic for this harness. I found the pin descriptions at the ecu but that doesnt help me with testing for voltage at the sensors...
     
  9. plugzit

    plugzit F1 Veteran
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    Bruce Bogart
    #34 plugzit, Dec 8, 2015
    Try ferraridatabase.com downloads workshop manual.
     
  10. ///Mike

    ///Mike F1 Veteran

    Dec 11, 2003
    6,097
    Bugtussle
    #35 ///Mike, Dec 8, 2015
    The sensors don't create voltage-- they vary resistance as a result of temperature. The colder the temp, the higher the resistance. So if your temp sensors are unplugged (infinite resistance) the ECUs think that the engine is as cold as the maps allow for.

    What you need to do is test the resistance across each sensor with the engine cold (makes it easier to get a consistent reading that way). Then plug the connectors into the sensors and go check the resistance across the two pins at the ECUs. You obviously don't want much variation between the reading at the sensor and the reading at the ECU, nor should you see much variation from side to side.

    If that checks out okay and yet the ECUs are still throwing ETS codes you might check the readings again with the engine hot, just to confirm (resistance readings should be lower).

    There should be a graph in the manual that will indicate proper resistance versus temperature, but I can't remember if there actually is one. If there isn't you can likely find enough info online to extrapolate a temp/resistance curve.
     
  11. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,966
    Milton, Wash.
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    Jeff B.
    #36 Miltonian, Dec 8, 2015
    Have you checked the diagram (Tav 18 in the 348 parts book) to confirm that the breather tubes are hooked up correctly? If the oil vapor is being routed directly from the cam covers to the intake "sleeves", rather than from the covers, to the tank, to the "sleeves", that might explain the problem, but it doesn't seem very likely... it MIGHT also be possible that the tubes are hooked up to the wrong fittings on top of the tank. Easy to check.
     
  12. ///Mike

    ///Mike F1 Veteran

    Dec 11, 2003
    6,097
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    #37 ///Mike, Dec 8, 2015
    Great point, Jeff. His car has apparently been hacked pretty badly in some areas so it's entirely possible that the crankcase vent system has suffered the same fate.
     
  13. Joshieburger

    Joshieburger Karting

    Aug 21, 2015
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    #38 Joshieburger, Dec 8, 2015
    Yes the breathers definitely go to the tank, then tank to intake, but you could be right about swapping the two tank lines. Anyone have a clear picture of the CORRECT hoses on the oil tank?
     
  14. Joshieburger

    Joshieburger Karting

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    #39 Joshieburger, Dec 8, 2015
    I should also add, even without cats or O2's, i do NOT get any o2 codes. Just the coolant temp, and thermocouple ecu codes. Stupid question but is it possible for the o2 connectors that i think i dont have, to be connected to the coolant temp sensors instead of the o2 sensors, thus making the engine think it is reading o2 numbers but is actually reading coolant temp numbers? Dont laugh too hard at that theory, im really just grasping at straws here. I still think its possible that my oil viscosity is too thin, which wouldnt solve my coolant temp problem but maybe solve my oil burning problem.
     
  15. Joshieburger

    Joshieburger Karting

    Aug 21, 2015
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    Oahu, Hawaii
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    #40 Joshieburger, Dec 12, 2015
    I took it out for a 25 mile ride holding it around 3-4000 rpms a lot. I did a couple 5-6000 rpm pulls. Brought it back to the garage and had no smoke. Barely even an oil smell. Ive done italian tune ups before but i guess not long enough. Sadly this still does not solve my electrical issues. I have the crank position sensors out now because they were both frayed and broken. I ordered new kia ones but im going to try to fix these ones up first and see what happens. Should take care of my intermittent bogging/hard starting problems im hoping...
     
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