F-350 7.3 Purrs like a kitten and sudden shut-off - Ford Powerstroke Diesel Forum
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Old 06-25-2013, 04:22 PM
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F-350 7.3 Purrs like a kitten and sudden shut-off

F-350 1999 7.3L sudden shutoff after running 5 minutes; replaced injector harnesses, glow plugs, VC gaskets and it purrs like a kitten and just shuts off; then replaced the cam shaft sensor; no change or improvement; did the jiggle test on all the harnesses and no change. I'm down to IPC, IBR. What do you think?
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Old 06-25-2013, 04:35 PM
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Without the right scanner, you're going to be Shootin'-in-the-Dark.

IPR & ICP? Could be, could also be something with the HiPres oil system, IDM, PCM all sorts of things. You need to monitor the sensors with something. If it were Me, I'd spend for an AutoEnginuity first before I spent another nickle throwing parts at it

After it dies, how long does iot take before you can restart? Right away or does it need to "cool-off" first?
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Old 06-25-2013, 04:39 PM
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Sudden engine off

It will start right away and run for a few minutes like nothing is wrong. I'll look up the tester.
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Old 06-26-2013, 05:35 AM
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Like maybe it's running out of fuel? Does the SES light come on?

This could be simple Fuel Delivery... How full is the tank? Are you @1/4 maybe?

What about the filter? How old is it?

Here's what I would do. After it dies, turn the key Off as quick as you can and drain the bowl to see what's in there and if you've simply run-out. Look above the pass ft tire, you'll see a 3/8" metal tube, against the motor that ends there, it's the drain for the bowl (yellow lever you slide to the side). Get a cup, open the lever, drain the fuel bowl, look at the fuel, close the lever. Then, turn the key to the ON position (should hear the pump) for 15 secs. Drain the fuel bowl again, whaddya got?
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Old 07-02-2013, 05:00 PM
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Now it purrs like a kitten all the time now!!

Performed the work in the following order: Double-checked oil level and it was normal; replaced fuel filter; addressed both banks by applying new wire harnesses, gaskets, and glow plugs (Motorcraft) made it run nice for about 5 minutes at a time [the harnesses and connectors were torched and glow plugs didn't look swift but they were original at 170k]. Then replaced the camshaft sensor....no change. Checked all wire harnesses on exterior both drivers and passenger side with wiggle test and visual inspection with no chaffing noted.... no change. Pulled the plug on the IPC and it was filled with oil. Replaced the IPC and cleaned the wire harness side with electrical cleaner. Runs like a champ now!! BTW, you can get original motorcraft parts on ebay sometimes for 1/10 the price. Check all of these things before letting some dude tell you you need all your injectors replaced (up to 4Gs!!!) leaving you holding the bag to fix the real problem. The total cost for me to fix and replace all of the above was $400.

Last edited by Beach; 07-02-2013 at 05:25 PM.
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Old 07-05-2013, 06:29 PM
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Look at the IPR as well. There's a tin nut on the back that rots off and allows the magnet to slide around that causes all kinds of weird stalling concerns.
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