Kill switch

blos101

blos101

Life Saver
Joined
Dec 27, 2009
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So I put my kill switch on the 12v puller today. It actually turned out better than I thought it would. Cut the red wire going to the fuel shut off selonoid,(don't know if I spelled that right but whatever), ran one wire down, and another back and tied it back into the other side. Have a swith the pulls to the side so I put an I bolt and ran a cable through the ilet hole and when pulled straight back it works perfect.:Cheer:
 
Have you tested it?? I've heard that the shut off solenoid wont pull back when the rack is at full travel, therefore it wont kill the truck
 
Well I tested it 3 times with with the truck idling and it worked perfect with killing it. Because I figure that the red wire is the one that makes the magnet pull the rod up from the ignition so if I break the key current then it will kill it and it does because it breaks the magnet power to pull the shutoff rod up. BUT for not killing at full rack I don't know, and I don't really want to flip it at WOT because I don't want to hurt the turbocharger. So we'll just have to see when or if it needs to be used. IDK what else to do with it. Yeah I could kill the power to the Airdog but its going to run still till the fuel runs out of the line.
 
If the rack is stuck at full travel it's going to take a force stronger than the spring in the shut off solenoid to shut the fuel off, a 3way dump valve in the fuel supply line is what most use as a positive fuel shut off.
 
If you stick a plunger in the pump at WOT the shut off spring will do nothing nor will a solid pull cable the rack will be stuck at WOT, the only way to bring her to her knees is to but a 3way dump valve on it or else it will rev to the moon or till parts start to fly.
 
Takes the fuel from going into the inj.pump and sends it back to the tank. It will shut it down in a hurry.
 
Walter Sobchak said:
What about a kill switch to shut down power to your lift pump?
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Problem with that is at high rpm's it will still suck the fuel out of your supply line and keep running and could cause parts to fly before it gets shut down.
Put the 3way as close to the inj.pump as posible. Some say the p7100 will still suck fuel from the tank even with a dead lift pump. I build p7100s every day and I think the only way it could happen is at high rpm's hope this helps.
 
01PPUMP said:
Problem with that is at high rpm's it will still suck the fuel out of your supply line and keep running and could cause parts to fly before it gets shut down.
Put the 3way as close to the inj.pump as posible. Some say the p7100 will still suck fuel from the tank even with a dead lift pump. I build p7100s every day and I think the only way it could happen is at high rpm's hope this helps.
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Ok so if I do that then what says it doesn't damage my P7100 from lack of lubrication from the fuel while it is shutting down at high rpm? All in all I guess that would be better than the engine itself blowing......
 
blos101 said:
Ok so if I do that then what says it doesn't damage my P7100 from lack of lubrication from the fuel while it is shutting down at high rpm? All in all I guess that would be better than the engine itself blowing......
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Indeed better than a blown motor if you have to pull the fuel dump the damage is already been done to the pump(stuck plunger).
 
yeah good point, that will give me an excuse to upgrade to a 13mm haha.:rockwoot:
 
where could a guy get one of these 3 way dump valves? i have an air guillotine on my puller, but one more safety device couldn't hurt anything
 
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