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2015 CNG Impala with problems

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  • #31
    Thanks guys for the info. Can you give me a heads up on where one could order one for in the $400 range. Showing no product availability in Ontario.



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    • #32
      Several dealers sell parts at discounts. Try GM Parts Direct. They are a dealer that does this and has a page you put in your car make, model and year. Then select the bi-fuel model and then fuel system. You will see the regulator and the price. Pay and it ships. BTW--- the part number you are looking for is 84016245. Check a couple of sites. I found it for US $396.96 on one site, didn't check too many others as I wasn't paying for it (warranty)
      Last edited by siai47; 09-30-2018, 07:15 PM.

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      • #33
        Looks Like $506 Ca up north https://www.gmpartsdepot.ca/p/Chevro.../84016245.html

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        • #34
          The main HP regulator is showing #52373032 as N/A does 84016245 supersede that part number? Please




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          • #35
            The 84016245 is what the dealer ordered and installed in my car. It's possible it is a superseded part # when they either ran out of the old regulator or made a change that makes it so it won't stick (hopefully). BTW if you are going to install this yourself, make sure you torque the high pressure fittings to 30 ft lbs of torque. This is per the SI. It seems really high for the size of the fitting but if you undertorque it, it will leak. Ask my dealer how he knows !.

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            • #36
              Thanks Si Interesting to know for sure if it has been superseded, I will inquire with Rotorex and see if they will give any info as to a updated reg on the Impala.

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              • #37
                Well it looks like I just joined the club. My 2015 impala with less than 12000 miles will not run on cng. I have the PO1a9 code and the soonest the dealer can get me in is Nov. 7th at which point they will not have the part.

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                • #38
                  Back from the dealer. They told me they don't work on any CNG. I may want to check in Pittsburgh or columbus.

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                  • #39
                    What was the condition of the high pressure filter. Rotarex replied to my enquiry and stated that some of the failures could be attributed to contamination of the reg. I have seen this firsthand with my ITT Reg after disassembly, which related back to my Fuelmaker being the source of contamination.


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                    • #40
                      2016 Impala Bi-Fuel CNG/Gas Problems
                      Posted to Technical Tips Forum on 10/14/2015

                      This is another post that will only be of use to G.M. technicians at the present time.

                      If you see a 2015 or 2016 CNG Bi-fuel Impala with a complaint of SES on and will not operate in CNG mode, check for P125D and P01A9 set current.

                      P125D is for the alternate fuel high pressure system small leak detected and P01A9 is for the alternate fuel rail pressure too high. If you see these codes, command the alternate fuel pressure regulator through the complete range of the control valves. If the up response is not immediate and the down response does not stabilize within 2 seconds, the alternate fuel rail pressure regulator is sticking.

                      The leak code is due to the high pressure bleeding through the regulator when the vehicle is off, causing a leak detection fault and the increase in rail pressure due to the regulator leak is causing high rail pressure on start up after sitting for a time. This sets the P01A9 code. G.M. is aware of this problem and a recall is forthcoming.

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                      • #41
                        The vehicle must be under warranty for them to pass you off. If this was a T&M job they would not mind you footing the bill to train thier techs. Have you given GM a call in regards to your situation.

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                        • #42
                          If it is under warranty, it is GM's problem to fix it. If their local independent dealer won't touch it, then I would contact GM directly. My small town dealer went ahead and tackled the problem even when I am sure their techs aren't trained in CNG repair. They have service guides and support available. It was no big deal for them--and no argument about working on it. Let GM find a dealer to fix it and get the car to that dealer and returned on their dime. As a side note, I have heard and seen contamination from CNG compressors (like oil carryover). However, it would really be hard for me to fault a Fuelmaker compressor for causing failure in a CNG system as it is an oilless compressor. The gas stream feeding it must be a mess and the filter in the compressor and in the vehicle must never have been maintained. I think your Rotarex guy might have been deflecting the problem away from them. Too many failures of the regulator on such a limited release vehicle. Just saying-----

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                          • #43
                            Called some more dealerships including the one I bought car from and no one wants to work on it. Contacted GM yesterday and the unhelpful person there could only suggest I keep calling dealers until I find one. Called back today and after 2 hours on the phone I was given a 15 digit Ref. # to show that I had called and was told someone that could help me would call me back in the next couple of days.

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                            • #44
                              Anyone know a dealer in the Ohio, WVA, PA area that will do warranty work?

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                              • #45
                                Remember the Fuelmaker uses consumables piston rings, that was the byproduct of the contamination in my regulator. At the time the system only had a low pressure filter. Do I feel that the hp filter is causing the problem, probably not but that said if they were to find a contaminated system you could be footing the bill.

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