mechanical shutoff to replace 12v magnetic - page 1 - General - VWDiesel.net The IDI, TDI, and mTDI source.

• mechanical shutoff to replace 12v magnetic by billybobf on 04 Apr, 2012 23:59
• as title says, Ive I cant get one I might make one, but wondering if there is already one made? dont want to rely on the 12v system for much...
• #1 by maxfax on 05 Apr, 2012 00:33
• If you could find a pump from an auto trans car, it would have a mech shutoff..
  
  Another option would be to rig some sort of a cable operated idle stop.. Pull the stop cable and the idle setting drops too low for it to run (saw it on a cummins with a ve pump).. Then they just removed the plunger from the electric solenoid..
• #2 by 410 on 05 Apr, 2012 05:55
• There is also a solenoid available for marine use that is opposite.  You have to apply power to shut the fuel off.  As far as reliability goes, these solenoids rarely fail.  If you're worried keep a spare one with you.
• #3 by 745 turbogreasel on 05 Apr, 2012 13:11
• Add the emergency shutoff lever from an auto, keep the electric, but remove plunger if needed.
• #4 by billybobf on 05 Apr, 2012 16:34
• OK, I guess I should explain that I was diagnosed with ADHD at a young age but was in advanced classes at the same time, I like to over process over think and over do everything.
  
  I was thinking a generator that I could jump start (a gen that sits for a year isnt going to have a working battery anyways) put the battery back in my rig and have it stay running.
  
  Or a very low weight and voltage eco car (even thought about no battery but that would be hard if it stalled anywhere (smaller battery and big lightweight CAP) (way over thought it there)
  
  or, just a smaller battery and small alt to be economical. LED lights all around, anything that takes much power, then super tall gears
• #5 by bajacalal on 05 Apr, 2012 19:06
• The thing is, if you lose the alternator, the solenoid would keep going on battery power for quite a long time. I drove from Stockton to San Diego once without a working alternator. It doesn't require much current. I think the solenoid would be one of the last critical systems to fail and you had better worry about things like the electric fan first. If you want something cable operated, I know a lot older diesels had them, I'm talking about stuff built before the late 70s. No idea how you would adapt that to your VE pump though.
• #6 by 745 turbogreasel on 05 Apr, 2012 19:20
• There is a spot in the side of the pump you knock out the plug, and put in the lever, if you don't already have one.
  
  I bet the solenoid wold run 40+ hours on a drill battery.
• #7 by billybobf on 05 Apr, 2012 20:15
• cool cool,
• #8 by srgtlord on 07 Apr, 2012 09:51
• or you could pull the plunger out of the stop solenoid  and put a manual valve on the fuel pump feed line.
• #9 by oldpoopie on 07 Apr, 2012 22:28
• Quote from: srgtlord on 07 Apr, 2012 09:51

  or you could pull the plunger out of the stop solenoid  and put a manual valve on the fuel pump feed line.
  

  I imagint this would starve injectors and airlock the system preventing restart.
• #10 by billybobf on 07 Apr, 2012 22:33
• sounded to me like it could put a nasty bit of vacuum on the internals of the pump?
• #11 by 8v-of-fury on 08 Apr, 2012 13:11
• Yes I too would think that restricting either the Supply or the Drain lines would cause a bit of havoc inside the pump.
  
  fwiw, the 12v system powering that 12v solenoid has worked on these pumps from AT LEAST 1975 all the way up until they changed to the PD engines and eliminated the IP. Not to mention most have lasted 1/4million miles or more.
  
  What is your beef with the way this was designed?? lol
• #12 by R.O.R-2.0 on 08 Apr, 2012 13:19
• Heres my pump. i run both shut offs.. i have both mechanical, and electronic..
  
  little red handle sticking off the side of the pump is the manual shut down.. my audi 5kTD has one too.
  
  Peugeot, a few other manufacturers, and VW/AUDI AUTOMATIC TURBO DIESELS all came with mechanical fuel shut offs also..
  
  
• #13 by billybobf on 08 Apr, 2012 16:04
• guessing its an opposite of the governor mod/idle stop screw, allows the slip collar to not build ANY pressure at the rotor/fully off the hole?
• #14 by fatmobile on 09 Apr, 2012 22:28
• So that's what that is.
   Then push it back and you can start again by engageing the starter?