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Converted to propane-knocks on lp

Discussion in 'Technical Chat' started by 05tacomalp, Jul 4, 2013.

  1. Jul 4, 2013 at 8:58 AM
    #1
    05tacomalp

    05tacomalp [OP] New Member

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    Propane
    I can't seem to find the cure to this. It only knocks on LP. Can the timing be adjusted?
     
  2. Jul 4, 2013 at 2:13 PM
    #2
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    The only way to cure a knock condition is if the ECU is programmed to LP conversion. The timing will all be based on assuming you are running gasoline.
     
  3. Jul 8, 2013 at 5:42 AM
    #3
    05tacomalp

    05tacomalp [OP] New Member

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    Propane
    Does the 05 have an octane sensor? Could Running premium gas advance the timing enough to stop the knock?
     
  4. Jul 8, 2013 at 7:38 AM
    #4
    BamaToy1997

    BamaToy1997 ASE Master Tech Vendor

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    As I recall, they don't use octane sensors, but instead typically they ramp the timing up until it senses preignition, then backs it down. I am not sure how that would work when running LP.
     
  5. Jul 8, 2013 at 12:07 PM
    #5
    RacecarGuy

    RacecarGuy Well-Known Member

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    Propane has an octane rating of 112, so it should be well above the level of premium gas. Could it be possible you are not running enough propane causing a lean knock?
     
  6. Jul 9, 2013 at 6:41 PM
    #6
    05tacomalp

    05tacomalp [OP] New Member

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    Propane
    I believe it should be getting ample propane. The exhaust trims were matched to the petrol trims. The system is a pretty pricey Prins VSI(Autogas) duel fuel system.
     
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