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Rotarex SIRIUS EVO Regulators

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  • Rotarex SIRIUS EVO Regulators

    What can you tell me about the SIRIUS evo CNG Pressure regulator?
    Cal Editor aka A.J.
    Lead Calibrator at PCM Calibrators
    ASE Master Certified since 1988
    ASE L1 Certified since 1994
    ASE F1 & A9
    GM Technician since 1999
    GM World Class Technician since 2009
    CSA Inspector

  • #2
    Re: Rotarex SIRIUS EVO Regulators

    They are common in BAF systems, especially the E vans and Transit Connect. We also used them back in the NaturalDrive days for the first Impalas and 4.8L vans. They generally work fine but are not well suited for high-flow applications such as engine displacements over 5L. As they don't run coolant to the regulator this speeds install time but the downside is if you have wet gas in cold climates there is some risk of regulator clogging.

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    • #3
      Re: Rotarex SIRIUS EVO Regulators

      I had a leak at the inlet fitting seal. It was a strange leak. we could smell it, but it was hard to catch leaking. It would come and go. The bubble would grow and then stop growing. then it would start to grow a few seconds or a minute later.
      It was hard to figure out the fitting. It looks to have a British Standard Pipe Parallel thread (BSPP)
      Cal Editor aka A.J.
      Lead Calibrator at PCM Calibrators
      ASE Master Certified since 1988
      ASE L1 Certified since 1994
      ASE F1 & A9
      GM Technician since 1999
      GM World Class Technician since 2009
      CSA Inspector

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      • #4
        Re: Rotarex SIRIUS EVO Regulators

        This one died. I don't like it at all. I guess it is time to put a GFI on this Impala
        Cal Editor aka A.J.
        Lead Calibrator at PCM Calibrators
        ASE Master Certified since 1988
        ASE L1 Certified since 1994
        ASE F1 & A9
        GM Technician since 1999
        GM World Class Technician since 2009
        CSA Inspector

        Comment


        • #5
          Re: Rotarex SIRIUS EVO Regulators

          You will want to ensure the outlet pressure of the replacement regulator matches the older Rotarex unit which, as I recall, is stamped on the regulator in BAR, not PSI. One BAR = 14.5 PSI.

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          • #6
            Re: Rotarex SIRIUS EVO Regulators

            Now, if some enterprising individual could come up with a truly bolt in regulator retrofit, with all lines, fittings , etc for the older Honda civic gx ( '97-00") and ('01-'05), at a cost that will not make the vehicle owner ill. A lot of these are starting to fail (diaphram leaks) from age. The only current fix is from honda for about $1500 and up.

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            • #7
              Re: Rotarex SIRIUS EVO Regulators

              6.2 bar on the regulator.
              One time it could be 6.0 bar at idle the next time it might be 5.6 bar. Rev it up it may drop down or it may hold steady. Holding the rpm's at 1200 or even 2500 no load the pressure has dropped below 5.2. I am thinking it hit 4.7 on the digital pressure guage with a Min/Max recorder. Under a load if it started at 6.0 it would be about 6.0 bar. The next time it may start at 5.8 and under a load it may drop to 5.6 or even 5.4 bar. The fuel trims reflect the pressure differences. The car came in as starts and idles, but will not drive. Stalls on Acell
              Cal Editor aka A.J.
              Lead Calibrator at PCM Calibrators
              ASE Master Certified since 1988
              ASE L1 Certified since 1994
              ASE F1 & A9
              GM Technician since 1999
              GM World Class Technician since 2009
              CSA Inspector

              Comment


              • #8
                Re: Rotarex SIRIUS EVO Regulators

                You might also check voltage to the lockoff solenoids (tanks, regulator).

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                • #9
                  Re: Rotarex SIRIUS EVO Regulators

                  The line is icing about 24 or more inches out of the regulator.
                  The good new is I have seen Zero signs of oil sludge this time in
                  Cal Editor aka A.J.
                  Lead Calibrator at PCM Calibrators
                  ASE Master Certified since 1988
                  ASE L1 Certified since 1994
                  ASE F1 & A9
                  GM Technician since 1999
                  GM World Class Technician since 2009
                  CSA Inspector

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                  • #10
                    Hi, I'm alan.
                    so I have a 2010 ford e250 v8 5.4l that is having a problem with electric part the obd2 code is "p0460" but I couldn't fix it because the car is cng and doesn't have level sensor or gas tank, does someone could help about this code? And it has a little black electronic box that has the wires in pressure sensor in the cng line and I don't know it name or what it does. Thanks

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                    • #11
                      P0460 - Fuel Level Sensor Circuit Malfunction The PCM monitors the fuel level input (FLI) circuit for electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified fuel fill percentage in the fuel tank. Empty fuel tank
                      Fuel pump (FP) module stuck open
                      Incorrectly installed fuel gauge
                      Damaged instrument cluster
                      CASE GND circuit open
                      FLI shorted to VPWR
                      Damaged PCM
                      Overfilled fuel tank
                      Fuel pump (FP) module stuck closed
                      Damaged fuel gauge
                      FLI circuit open
                      FLI circuit shorted to CASE GND or PWR GND
                      CSE GND shorted to VPWR
                      Monitor FLI PID and FLI V PID in key ON engine running. FLI PID at 25% fill (with none matching fuel gauge) and FLI V PID less than 0.90 volts [for FLI PID at 75% fill (with none matching fuel gauge) and FLI V PID greater than 2.45 volts] indicates a hard fault.


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                      • #12
                        The black box is called a pressure transducer.
                        Does the fuel gauge operate properly?

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