nitrous problem

Mopar Racers Forum

  1. aaronk785

    aaronk785 Well-Known Member

    Messages:
    935
    Likes Received:
    752
    Joined:
    Apr 21, 2013
    Location:
    westmoreland ks.
    Local Time:
    6:29 AM
    I recently put a nitrous kit on my 340. Its been working well until last week. When I acctivate the microswitch it falls on its face now. Like its out of nitrous. I checked both solenoids they seem to be working fine. Pulled the carb and hit it and the plate seem to be putting out plenty of nitrous and gas. Runs awesome on motor only. Unplugged the proggresive controller used a relay. Same thing.. The only thing i changed was the timing by 2 degrees and a fresh bottle. I'm stumped. Bottle at 950 psi
     
    • Like Like x 1
    • Dana67Dart

      Dana67Dart The parts you don't add don't cause you no trouble FABO Gold Member

      Messages:
      9,201
      Likes Received:
      6627
      Joined:
      Jul 16, 2017
      Location:
      Northern Colorado
      Local Time:
      5:29 AM
      Fresh bottle might have more pressure?
       
    • aaronk785

      aaronk785 Well-Known Member

      Messages:
      935
      Likes Received:
      752
      Joined:
      Apr 21, 2013
      Location:
      westmoreland ks.
      Local Time:
      6:29 AM
      I don't think so cause i have a heater and run at 950 bottle pressure regardless. But thanks for your answer.
       
    • 33IMP

      33IMP Well-Known Member

      Messages:
      2,596
      Likes Received:
      2750
      Joined:
      Jul 3, 2020
      Location:
      Taxifornia, soon 2b arizona
      Local Time:
      4:29 AM
      I would unplug the fuel solenoid, and see what the nitrous spray looks like. I'm stumped like you. Instant thought was no nitrous delivery, but you say it's good.
      Edit: simple test... put the timing back to where it was.
       
      • Like Like x 1
      • Thanks! Thanks! x 1
      • aaronk785

        aaronk785 Well-Known Member

        Messages:
        935
        Likes Received:
        752
        Joined:
        Apr 21, 2013
        Location:
        westmoreland ks.
        Local Time:
        6:29 AM
        I've done the nitrous solenoid alone and it looked strong. I will try the timing tommarow Thanks.
         
      • K.O. SWINGER

        K.O. SWINGER Meeting in the alley since 1976

        Messages:
        2,709
        Likes Received:
        2597
        Joined:
        Nov 18, 2010
        Location:
        oregon
        Local Time:
        6:29 AM
        :popcorn:keep us posted what you find.
         
        • Agree Agree x 1
        • j par

          j par Well-hung Member

          Messages:
          29,774
          Likes Received:
          17597
          Joined:
          Jul 2, 2014
          Location:
          Portland Oregon
          Local Time:
          4:29 AM
          :popcorn:..
           
        • TT5.9mag

          TT5.9mag Two atmospheres are better than one

          Messages:
          2,614
          Likes Received:
          2732
          Joined:
          May 5, 2016
          Location:
          So cal
          Local Time:
          4:29 AM
          2 degrees which way? Two more or two less. Cause two degrees too many if you’re on the edge will cause a problem. What do the plugs look like?
           
        • Jeremiah

          Jeremiah Well-Known Member

          Messages:
          350
          Likes Received:
          347
          Joined:
          Oct 2, 2013
          Location:
          Rogue River, OR
          Local Time:
          4:29 AM
          Edit, condensed this post to post below
           
          Last edited: Oct 26, 2021
          • Agree Agree x 1
          • Jeremiah

            Jeremiah Well-Known Member

            Messages:
            350
            Likes Received:
            347
            Joined:
            Oct 2, 2013
            Location:
            Rogue River, OR
            Local Time:
            4:29 AM
            Check fuel pressure, check all n20 orifices are clean by disassembly/inspection ( do you have a filter?), change plugs, try a different bottle, change coil wire& coil in that order.

            If it was lean it would shoot ducks or put your hoodscoop on the staiway to heaven. Rich or no gas it willfall on its face.

            Do you have the ability to verify AFR?
             
            • Thanks! Thanks! x 1
            • Agree Agree x 1
            • j par

              j par Well-hung Member

              Messages:
              29,774
              Likes Received:
              17597
              Joined:
              Jul 2, 2014
              Location:
              Portland Oregon
              Local Time:
              4:29 AM
              I'm thinking it's something simple as well.. just haven't found it yet..
               
              • Agree Agree x 2
              • aaronk785

                aaronk785 Well-Known Member

                Messages:
                935
                Likes Received:
                752
                Joined:
                Apr 21, 2013
                Location:
                westmoreland ks.
                Local Time:
                6:29 AM
                Just made a hit with 28 degrees and new bottle. No difference.
                 
              • aaronk785

                aaronk785 Well-Known Member

                Messages:
                935
                Likes Received:
                752
                Joined:
                Apr 21, 2013
                Location:
                westmoreland ks.
                Local Time:
                6:29 AM
                My next move. No afr. I'll start checking in the mourning. Thanks
                 
              • j par

                j par Well-hung Member

                Messages:
                29,774
                Likes Received:
                17597
                Joined:
                Jul 2, 2014
                Location:
                Portland Oregon
                Local Time:
                4:29 AM
                I know they've got a f gages that you don't even need to weld they just have a band that seals up around the pipe.
                Extremely handy piece of equipment for what you're doing and relatively inexpensive..
                 
                • Agree Agree x 1
                • Garrett Ellison

                  Garrett Ellison Amateur driver on public roadway, do not imitate.. FABO Gold Member

                  Messages:
                  4,504
                  Likes Received:
                  3718
                  Joined:
                  Jan 1, 2018
                  Location:
                  Southwest VA
                  Local Time:
                  7:29 AM
                  If setting the timing back didn’t affect it, then you’ve probably gotten some grit or trash in the supply line on the bottle you started having problems with (maybe even moisture freezing in the supply line?). I would look at plumbing the bottle up to back blow the supply solenoid and the feed line/nitrous filter (if you have a nitrous filter).
                   
                • TT5.9mag

                  TT5.9mag Two atmospheres are better than one

                  Messages:
                  2,614
                  Likes Received:
                  2732
                  Joined:
                  May 5, 2016
                  Location:
                  So cal
                  Local Time:
                  4:29 AM
                  Post 8. What do the plugs look like? What is the “dynamic” fuel pressure on the nitrous side? Do you even have separate fuel supply? You can guess all day what’s wrong but you need to start diagnosing it properly. And I’d suggest not continuing to make nitrous passes until you find something.
                   
                  • Agree Agree x 2
                  • TT5.9mag

                    TT5.9mag Two atmospheres are better than one

                    Messages:
                    2,614
                    Likes Received:
                    2732
                    Joined:
                    May 5, 2016
                    Location:
                    So cal
                    Local Time:
                    4:29 AM
                    Are you using any electronics as an ignition retard or just manually pulling the timing back?
                     
                    • Agree Agree x 1
                    • jimjimjimmy

                      jimjimjimmy lobsterman FABO Gold Member

                      Messages:
                      4,829
                      Likes Received:
                      1735
                      Joined:
                      Nov 2, 2010
                      Location:
                      p. e. i.
                      Local Time:
                      8:29 AM
                      would it ever be as simple as the bottle turned the wrong way and the siphon tube pointed up ? probably not but it could happen maybe .
                       
                      • Agree Agree x 1
                      • aaronk785

                        aaronk785 Well-Known Member

                        Messages:
                        935
                        Likes Received:
                        752
                        Joined:
                        Apr 21, 2013
                        Location:
                        westmoreland ks.
                        Local Time:
                        6:29 AM
                        Manual retard. Flowing fuel pressure is 9lbs. System calls for 8 to 10. Stand alone fuel system for nitrous with 110 in fuel cell. Plugs show no detonation but look a little rich. Line on ground strap looks good.
                         
                        • Like Like x 1
                        • TT5.9mag

                          TT5.9mag Two atmospheres are better than one

                          Messages:
                          2,614
                          Likes Received:
                          2732
                          Joined:
                          May 5, 2016
                          Location:
                          So cal
                          Local Time:
                          4:29 AM
                          Ok now we’re getting somewhere. If it’s rich it will just lay over and not gain rpm when you hit the button. If it’s not flowing nitrous your bottle pressure won’t change after a run. I would crack a nitrous line just before the solenoid and have someone crack open the bottle valve. Then verify clean voltage at the solenoid when activated. Then hook the whole system up and activate the nitrous side through the plate. If all looks good, put a new set of plugs in it and go test. I might drop a pound of fuel pressure from 9 to 8 as a test for the first run also.
                           
                          • Thanks! Thanks! x 1
                          • Bobzilla

                            Bobzilla Well-Known Member

                            Messages:
                            1,221
                            Likes Received:
                            934
                            Joined:
                            Aug 10, 2017
                            Location:
                            Southeast Michigan
                            Local Time:
                            7:29 AM
                            Do the tests TT5.9mag suggested.
                            Both times this happened to me it ended up being the nitrous solenoid itself. My system would stay on the car while it sat over the winter, then it would not work with same symptoms the next summer. Solenoid seamed to bench test ok but replacing it fixed the problem, like it only failed to open while engine is running.
                            Now when my car sits for the winter I remove the plate and solenoids and store them in the house and problem never happened again.
                             
                            • Thanks! Thanks! x 1
                            • aaronk785

                              aaronk785 Well-Known Member

                              Messages:
                              935
                              Likes Received:
                              752
                              Joined:
                              Apr 21, 2013
                              Location:
                              westmoreland ks.
                              Local Time:
                              6:29 AM
                              Thanks everyone. I will run the test suggested and let you know the outcome. I’m starting to think solenoid too.
                               
                            • 345man2

                              345man2 Well-Known Member

                              Messages:
                              607
                              Likes Received:
                              53
                              Joined:
                              Feb 9, 2009
                              Local Time:
                              8:59 AM
                              Either bad nos solenoid and it’s spraying straight fuel or your nos provider has a bad set up and your bottles are being pumped full of air and I know it sounds crazy but have seen it happen
                               
                              • Thanks! Thanks! x 1
                              • aaronk785

                                aaronk785 Well-Known Member

                                Messages:
                                935
                                Likes Received:
                                752
                                Joined:
                                Apr 21, 2013
                                Location:
                                westmoreland ks.
                                Local Time:
                                6:29 AM
                                Think I have a bad nitrous solenoid coil. It is cracked down the middle hole and leaked a little oil or something out. Hope thats it. Will order a replacement.
                                 
                                • Like Like x 1
                                • aaronk785

                                  aaronk785 Well-Known Member

                                  Messages:
                                  935
                                  Likes Received:
                                  752
                                  Joined:
                                  Apr 21, 2013
                                  Location:
                                  westmoreland ks.
                                  Local Time:
                                  6:29 AM
                                  OK. I feel pretty dumb. I’m new to nitrous and it shows. I had no idea that the inlet fitting on the nitrous solenoid was a filter/screen. It was 80 percent blocked. So nitrous could get through but was weak. Cleaned it and will test tomorrow. Hope this fixes it. Thanks to everyone.
                                   
                                  • Thanks! Thanks! x 1
                                  1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
                                    By continuing to use this site, you are consenting to our use of cookies.