Lost power then died... - Ford Powerstroke Diesel Forum
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Old 12-22-2013, 03:06 PM
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Lost power then died...

Hey guys,
Yesterday I was doing some running around in my '97 F-350 and just cruizing down the road at about 50mph I lost about 75% power and then 100%. The RPM's slowly dropped and I was able to pull into a gas station. It was idling but rough. After a total of about 40 seconds it cleared up and ran fine. I drove another 15 miles and stopped for about 30 minutes then got back in and continued home. After about 5 miles it started again, complete loss of power and had to pull over. This time the truck shut off. I got out took a look under the hood, didn't see anything out of place. Also checked the valve cover harnesses and they were connected and appeared to be ok. Got back in it and After trying cranking for about 30 seconds I got to fire up and I was able to limp another mile. I was only a half mile from home and had a very small hill to get up but it was having none of it. Pulled over for the last time, and it died. I could get it to start back up after 30-45 seconds of cranking and I could get it to rev up slowly to about 2500 rpms. but after 10-15 seconds the rpms would drop and it would either die or idle very rough for a few seconds then die. It seemed like i could rev it up then it would starve for fuel or maybe hp oil. Oil level is good, it did not smoke during any of this. It hasnt been real long since i put a fuel filter in it but im going to throw another one in it tomorrow. I replaced the fuel pump in the valley about 6 years ago (only 40k ish tho). When i crank it now it will try and fire a little but nowhere close to starting, sounds like 2 cylinders are hitting. Let me know if anyone has some pointers.

Thanks
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Old 12-22-2013, 03:32 PM
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Sounds like your Injector Driver Module (IDM) may have given up the ghost.
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Old 12-23-2013, 06:38 PM
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any way to test it or is it easier to steal one from a friend and swap test?
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Old 12-23-2013, 06:59 PM
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It is best to steal a known good one from a friend.
I carry a spare with me now. I had a bad experience with a IDM. I was in a small mountain town on a Sat afternoon. I hooked up my trailer pulled it about 15 ft. right out into the campground road and there it died. The campground owner was nice enough to drive me into town to the Stealer Ship which was the only place that had one. 1K and 15min swap later I was back on the road. Now I keep an extra under my back seat next to my CPS
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Old 12-24-2013, 01:00 AM
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Check your fuel pressure my 97 acted very similar when the fuel pump died


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Old 12-24-2013, 02:55 AM
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Also pop the plug on the HPOP reservoir and look at the level... mine had similar symptoms when my LPOP went out.
fill res. then see if it will start for a couple seconds. If it does LPOP likely cause.

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Old 12-24-2013, 05:51 AM
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Quote:
Originally Posted by 95and05 View Post
Also pop the plug on the HPOP reservoir and look at the level... mine had similar symptoms when my LPOP went out.
fill res. then see if it will start for a couple seconds. If it does LPOP likely cause.

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If it was the loop it shouldn't have restarted that many times though. I had a lpop fail there was just nothing
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Old 12-24-2013, 07:48 AM
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Swapped them idm and threw in a new fuel filter for good measure. Nothing. Still after about 30-40 seconds of cranking I can get it to barely fire off. Haven't checked the fuel pressure yet, got Christmas Eve lunch first. I know it's a dummy gauge but after cranking my oil pressure gauge is showing normal so I'm assuming the lpop is pumping.
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Old 12-24-2013, 09:12 AM
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Originally Posted by PhilMac View Post
Swapped them idm and threw in a new fuel filter for good measure. Nothing. Still after about 30-40 seconds of cranking I can get it to barely fire off. Haven't checked the fuel pressure yet, got Christmas Eve lunch first. I know it's a dummy gauge but after cranking my oil pressure gauge is showing normal so I'm assuming the lpop is pumping.
I would agree your lpop is working I would bet fuel pump went


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Old 12-24-2013, 11:38 AM
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going to pick up a gauge shortly. what should the pressure be cranking but not running?
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