Dunno what happend need help
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Junior User
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From: Perrysville ,IN
Dunno what happend need help
(86 6.9 n/a , c6 )I'll just start from the top. I got out of school today started fine let it idle for a while (I'd say 10 mins) idled fine sounded normal. Drivng down the road I start to smell burning diesel as in that sweater smell of say a diesel heater or when thrown on a fire, driving down the road the rpms seem to ramp up and down a little but nothing crazy, so I get home pop the hood and see that theirs diesel coming out from injector 1 so I shut it off and find that the copper washer that is supposed to be under the injector is not their so I put one on and tighten it then start it and see that number 3 is spraying out fuel so I shut it off and its so loose I have to hold the injector just to loosen the injector line off. So I tighten it up and it starts for a few seconds then dies like it's out of fuel and it will not start now nomader how much I crank. I previously had no air intruson so that's very doubtobly the problem. So any suggestions will be welcome. Thank you
Lead Driver
Joined: Apr 2008
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Thats an interesting one. From what you describe, i wouldnt think the two issues are related. Are you SURE there wasnt a copper washer? It wouldnt seal otherwise. Odds are its glued to the head and covered in soot. I have had a couple loose injectors like that, just attributed it to vibration. Check that you have power to the pump, and that the FSS clicks when energized. If that checks out, loosen a couple lines at the injector and crank to see if you get fuel, wont be alot, but should be enough to run down the cap / injector after 10 seconds or so.
Postmaster
Joined: Dec 2011
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If you are getting fuel up through that leak, however... that means that the fuel isn't burning in the cylinder(otherwise, you'd get carbon, which would eventually fill up the gap).
As far as injectors working themselves loose... I finally started torquing them to 100 ft/lbs, and haven't had any issues since. It's enough to actually squish the copper a bit and make a good seal.
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Junior User
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From: Perrysville ,IN
So I popped the injector lines off and no fuel comming out of the lines, I have fuel at that shrader valve their by the fuel filter so I'm guessing something is wrong with a gate clossing at the injector pump?
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In order to get noticable fuel out of the injector lines while cranking you need:
1. fuel to the IP.
2. The Fuel Shut Off solenoid(frontmost terminal on the IP) to have power
3. The throttle floored
If you don't have all three of these, you aren't going to see much or any fuel out of those lines. Also, if they are filled with air, it takes quite a while to get the lines filled with diesel again.
1. fuel to the IP.
2. The Fuel Shut Off solenoid(frontmost terminal on the IP) to have power
3. The throttle floored
If you don't have all three of these, you aren't going to see much or any fuel out of those lines. Also, if they are filled with air, it takes quite a while to get the lines filled with diesel again.
Thread Starter
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Junior User
Joined: Mar 2016
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From: Perrysville ,IN
In order to get noticable fuel out of the injector lines while cranking you need:
1. fuel to the IP.
2. The Fuel Shut Off solenoid(frontmost terminal on the IP) to have power
3. The throttle floored
If you don't have all three of these, you aren't going to see much or any fuel out of those lines. Also, if they are filled with air, it takes quite a while to get the lines filled with diesel again.
1. fuel to the IP.
2. The Fuel Shut Off solenoid(frontmost terminal on the IP) to have power
3. The throttle floored
If you don't have all three of these, you aren't going to see much or any fuel out of those lines. Also, if they are filled with air, it takes quite a while to get the lines filled with diesel again.
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