6.9 shuts off by itself - Ford Powerstroke Diesel Forum
6.9L IDI Diesels Technical discussion of topics related to vehicles powered by the 6.9 Liter In-Direct Injection Navistar engines.

 
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post #1 of 10 Old 11-03-2009, 03:52 PM Thread Starter
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6.9 shuts off by itself

got a buddie with a 6.9 that just shuts off by it self like the injector pump is loosing power to the shut off but cranks back up some times

08 f250 king ranch 4x4 innovative 3.03 tuned,5" straight pipe,fully deleted, leveled on 35's, 20x10 -12, cac pipe,diesel site coolant filter

sold 05 xlt f250 6.0l fx4 reg cab black 6" lift studded and deleted, king ranch seats
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post #2 of 10 Old 11-03-2009, 04:24 PM
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Run a wire from the battery positive to a toggle switch in the cab and then to the fuel solenoid. That way you can test the ignition switch and the wiring to and from. If it still has an issue I would bet on air getting into the fuel lines...

1997 F-250 HD XLT CCSB 4x4, 7.3L PSD, ZF5, Dana 60
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post #3 of 10 Old 11-03-2009, 05:23 PM Thread Starter
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thanks i should have tried that, another question what is the second wire on the injector pump behind the fuel solenoid

08 f250 king ranch 4x4 innovative 3.03 tuned,5" straight pipe,fully deleted, leveled on 35's, 20x10 -12, cac pipe,diesel site coolant filter

sold 05 xlt f250 6.0l fx4 reg cab black 6" lift studded and deleted, king ranch seats
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post #4 of 10 Old 11-03-2009, 05:26 PM
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Well I know there is a cold idle rpm solenoid that bumps the throttle lever up, one fuel shut off solenoid and one timing advance solenoid.

1997 F-250 HD XLT CCSB 4x4, 7.3L PSD, ZF5, Dana 60
08+ diff cover, 33x12.50R20's on Moto Metal 962's
3" DP to 5" straight pipe, pyro & boost guage, HPx Line,
Edge Evo, CX Racing intercooler, 6.0L fan, 1.0 Housing,
SD pump, bowl delete E fuel, 4.10, EBPV delete and ped
LEDs and HIDs, Ranger shift knob, RiffRaff Billet wheel
Black, Tan interior.

38' Gooseneck Enclosed Car Hauler.
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post #5 of 10 Old 11-03-2009, 05:27 PM Thread Starter
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we just swaped engines out about 3 months ago cause the jasper engine developed a loud tick after glowplug replacement, he had another truck with a engine that was in better shape, so we swaped um out instead of trying to tear in to it. ran fine for the first month or so then he was going down the road and it just cut off like u turned the switch off, and now it will idel for about 5 min and just cut off no sputtering

08 f250 king ranch 4x4 innovative 3.03 tuned,5" straight pipe,fully deleted, leveled on 35's, 20x10 -12, cac pipe,diesel site coolant filter

sold 05 xlt f250 6.0l fx4 reg cab black 6" lift studded and deleted, king ranch seats
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post #6 of 10 Old 11-03-2009, 05:36 PM
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Well I know they had issues with the ignition switches on the 87-93 mustangs and F-150's, it might be the same issue with the 250-up models also. I would try to diagnose it before throwing parts at it. Wire up a toggle switch, run it through the window, and drive on. If it still cuts off the solenoid could be failing its self or you have air getting in the lines, bad lift pump, etc.

1997 F-250 HD XLT CCSB 4x4, 7.3L PSD, ZF5, Dana 60
08+ diff cover, 33x12.50R20's on Moto Metal 962's
3" DP to 5" straight pipe, pyro & boost guage, HPx Line,
Edge Evo, CX Racing intercooler, 6.0L fan, 1.0 Housing,
SD pump, bowl delete E fuel, 4.10, EBPV delete and ped
LEDs and HIDs, Ranger shift knob, RiffRaff Billet wheel
Black, Tan interior.

38' Gooseneck Enclosed Car Hauler.
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post #7 of 10 Old 11-04-2009, 11:24 PM
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Quote:
Originally Posted by 05strokinfx4 View Post
we just swaped engines out about 3 months ago cause the jasper engine developed a loud tick after glowplug replacement, he had another truck with a engine that was in better shape, so we swaped um out instead of trying to tear in to it. ran fine for the first month or so then he was going down the road and it just cut off like u turned the switch off, and now it will idel for about 5 min and just cut off no sputtering
Do these older trucks have anti-idle switches. My uncles '97 will shut off like that if no pedals are touched for 5 minutes.
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post #8 of 10 Old 11-05-2009, 08:23 AM
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Does it shut off suddenly, or idle, then slowly die out?

Sounds like the IP is going, they sometimes do that when they are older.

-Justin-
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges

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post #9 of 10 Old 11-05-2009, 03:12 PM Thread Starter
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nah the ip was replaced in the 90's motor is out of a 85, sat for about 5yrs but always started up pretty easy with a little shot of starting fluid. it shuts of all of a sudden, and there are no fuel leaks or nothing the hose have been replaced couple yrs ago too
should get to straight wire it this weekend and see what happens

08 f250 king ranch 4x4 innovative 3.03 tuned,5" straight pipe,fully deleted, leveled on 35's, 20x10 -12, cac pipe,diesel site coolant filter

sold 05 xlt f250 6.0l fx4 reg cab black 6" lift studded and deleted, king ranch seats
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post #10 of 10 Old 11-14-2009, 06:14 PM Thread Starter
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found the problem, the fuel pump solenoid was bad took it off and it was smoking. it was cutting off cause it was over heating and wouldnt cut back on i guess, swapped in another one and is running good now.

08 f250 king ranch 4x4 innovative 3.03 tuned,5" straight pipe,fully deleted, leveled on 35's, 20x10 -12, cac pipe,diesel site coolant filter

sold 05 xlt f250 6.0l fx4 reg cab black 6" lift studded and deleted, king ranch seats
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