Hey, I have an 86' f250 with a 6.9L. I reciently put new injectors, returnline kit, and fuel lines in it. Now she wont start.... i found a random *** wire (looks pulled) but i cant find where the heck it goes. i hooked a test light to positive terminal, touched the wire when i turn on the ignition and get positive. this means its a ground correct? doesnt light testlight until ignitions on.. its located right around behind alternator area but isnot part of the tach wire assembly. it does have a plug on it but after the plug it goes for about a foot and looks pulled exposing the wire. i dont believe its fuel pump. i dunno.. truck turns over n over. even used ether. flutters to life but dont fire! thanks guys!

 

Do you have all three wires connected the injection pump. that sounds like what is the problem.

 

It sounds like a fuel shutoff solenoid to me also you should have three wires connected to your IP :


If this doesn't post back with some more info

 

I believe that i have all three wires on the IP. sorry.

 

Just some thoughts.

Have you checked your fuel shutoff solenoid for 12v when the ignition is on?
Could the wire be part of the 6.9 style fuel heater? (to the fuel line from the fuel pump up to the filter head)
There's a temperature switch just behind the alternator next to the thermostat housing. It should have 2 flat blade connectors on it. I've seen these broken off before.

If you could tell us the color code of the wire, we could tell you what it's to.

But first make sure you have 12v at your fuel shutoff solenoid. Next up if you've replaced your fuel lines, injectors and return kit, you'll have a bunch of air in the system. Have you been working to bleed the air from the lines or did you crank everything down tight and hope it'd fire right up? You'll likely need to bleed the air out before you have a snowballs chance in hell of it starting up.

 

That means that the wire needs to be connected to something and gives a signal to something else when the ignition is turned on.


How long did you try cranking the engine over after you did the ip and injectors? If you don't bleed the air out with the valve on the side of the filter head and just crank the engine over it will take a long time to to fire up.

 

If you could snap a picture with it in the place you found the wire...that would be like perfect....I recently was tearing into a 86 6.9 so i could probably tell you what it is.

 

yes, i bled out the only by the fuel filter stem. pic up soon!

 

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could u get a better pick i couldnt make heads or tails of the pick

 

im at college thats from lastnight. it connects to the same harness that the glowplugs are in. its between the front passenger side glowplug plug and the 2 prong plug that goes into the block.