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  • Pressure Switch Issues

    It's no surprise that all of a sudden we are having issues with our pressure switches and are quickly working on a resolution. Stay tuned here for updates. The two common issues are either the green light staying on all the time(older style) or leaking(newer style).

    Just a quick explanation of what the pressure switch does. The ONLY thing it does is switch off the diesel pump when the Vegistroke reaches operating pressure. The pressure switch has NO affect what so ever on the timing or temperature controls for the V3. The only possible problem that can be caused by a bad pressure switch is a malfunction of the Diesel pump. That can be easily fixed by installing the 3pin jumper plug that comes with the kits, just in case something like this was to happen.

    So what does this mean for oil use? well it means that the diesel pump won't be shut off and the engine will run on whatever fuel has the higher pressure. The OEM pressure varies by as much as 20 psi, so each situation will be different.

    How to test: An Ohm meter or multimeter will be needed. The old style switches will have black, red and blue wires. With the system in the off position Unplug the switch and do a resistance check between all three wires following the below order:
    Black to Red- Open
    Black to Blue- Short
    Red to blue - Open
    Any reading other than listed is a bad switch.

    The new switches have red, black and green wires.
    Black to Green - Short
    Black to Red - Open
    Red to Green - Open

    Again any reading other than listed is a bad switch.

    Any questions please feel free to call, just be patient!
    1999 F-350 Lariat 7.3 385,000 miles and counting
    2000 VW Jetta 2.0
    1966 Jeep J-300 with EFI 351W

  • #2
    Good stuff! I had actually forgot the procedure for checking that switch.

    Thanks for the info Jason!
    Greasin & Grinin
    Vegi oil powered since Aug 08
    2006 F-250 PSD - CC, Lariat, 4X4 - Vegistroke converted 1/27/13!!
    2008 F-250 PSD - CC, Lariat, 4X4 - Sold
    2005 F-250 PSD - CC, Lariat, 4X4 - Sold

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    • #3
      any update on the pressure switch issue?
      thanks
      chris

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      • #4
        As a matter of fact there is. First, we are going back to the original vendor of the pressure switches that do not leak and whose only issue was not being able to handle the rated current. Second, we have come up with and tested a relay that will be wired in between the existing wiring and pressure switch plug that will allow the current for the Diesel pump to be handled by the waterproof 30a relay. This will be a permanent fix. The downside is that the rollout will be slower than we would like. Those who have been broke the longest will be replaced first.
        1999 F-350 Lariat 7.3 385,000 miles and counting
        2000 VW Jetta 2.0
        1966 Jeep J-300 with EFI 351W

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        • #5
          thanks for the update.

          Comment


          • #6
            Would this have anything to do with my loss of pressure on WOT?
            I noticed again last night when the system was on, i had 75 psi and stomped on it and i saw the light flickering off and looked at the pressure guage and it was down around 55 ish. Its not a real big deal but it should not do that i don't think.
            Wonder if it would do that with my stock tune in? I'll have to try that but i hate stock!

            Comment


            • #7
              Originally posted by Fordnut74 View Post
              Those who have been broke the longest will be replaced first.
              I hope I am at the top of the list. The quick fix is working great but I miss my "Automatic V3". You should have receive the 3 leaking pressure switches that I returned.

              Marty
              2000 F250 7.3L
              Vegistroke installed July 12, 2008

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              • #8
                green light glowing low

                EDITED

                I moved your flaming post to the admins section where it won't be in the public eye and it will be more likely to be seen by Jason.

                thanks and please keep flaming to private messages directed at the persons involved only.
                Last edited by Clay; 12-22-2008, 02:37 PM.

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                • #9
                  If you're referring to the constant glow of the switch that has been discussed here several times, that is normal. If your just saying that the light is on, but only slightly dimmer than normal, that is different and I can't comment.

                  Search for the first scenario and see if it matches yours. There are 2 lights in the switch.
                  Vegistrokin since 08/23/08

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                  • #10
                    Originally posted by Paul Leeber View Post
                    Pauls edited post
                    Does your green light go off when you turn the switch to the off position?
                    If it does not go off you are getting voltage from your vegi pump to the pressure switch. I am currently running my V3 with the pressure switch pluged and a toggle switch wired to my diesel pump. The V3 run flawless it is just not automatic. I understand you are frustated but I would not call this junk. DFA has had problems with the presure switches and they have found a solution. I am still grinning when I pass the diesel pump.

                    I have never had an issue with Jason, James, or John calling me back. Keep trying. Also check out my "leaking pressure switch quick fix" post for more information. http://dinofuelalternatives.com/DFAf...read.php?t=448
                    Last edited by Clay; 12-22-2008, 02:38 PM.
                    2000 F250 7.3L
                    Vegistroke installed July 12, 2008

                    Comment


                    • #11
                      Good News!! We finally received confirmation on the next order of Pressure switches!! Supposed to be here by next Wednesday wich means we can finally start getting them sent out. Should have enough to cover everyone who is waiting. And this will be the last and final fix!:cheers:
                      1999 F-350 Lariat 7.3 385,000 miles and counting
                      2000 VW Jetta 2.0
                      1966 Jeep J-300 with EFI 351W

                      Comment


                      • #12
                        The man in Brown just dropped off the Pressure switches so those will be going out today. Already have all the relays and boxes made up! For those of you who have waited patiently, thank you, you troubles will soon be over!
                        1999 F-350 Lariat 7.3 385,000 miles and counting
                        2000 VW Jetta 2.0
                        1966 Jeep J-300 with EFI 351W

                        Comment


                        • #13
                          Woot woot !!!


                          Oh wait, i don't need one

                          Comment


                          • #14
                            Originally posted by Fordnut74 View Post
                            The man in Brown just dropped off the Pressure switches so those will be going out today. Already have all the relays and boxes made up! For those of you who have waited patiently, thank you, you troubles will soon be over!
                            That great news, it will be nice to get back auto switching again.

                            My V3 is starting to look rather nasty from the leaking pressure switch.
                            The weather will have to warm a bit so I can clean it up, 4 degrees predicted here tonight. :cheers:
                            95 F250XL PSD SuperCab BTS auto , Gearhead Tuned, Vegistroke V3 , Tymar Intake, Stage 1's ADRENALINE HPOP. Absolute CF
                            Early 99 XLT SuperCab Auto, MBRP 4" Exhaust, DIY Tymar, Autometer Gauges.

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                            • #15
                              would this have to do with the desil tank disapering fast than noraml i was think som

                              Would this have to do with the diesel fuel disappearing out of the tank fast than normal? i was thing someone was stilling it.
                              Last edited by wcmsavannah; 06-18-2009, 06:49 AM.
                              veg3 april 08:
                              2006 F250

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