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Old 04-14-2011, 02:01 PM
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Need Help ASAP. Truck running fine, just quit all of sudden

1997 f250 7.3

Title says it all, truck was running fine. Idling across plant and quit with no indication while it was running, like a light switch. Have fuel, have power, cranks and cranks. Guessing electrical, maybe injectors not getting power? Checked all fuses inside and under hood, good. Found a NAPA and changed I believe the crank sensor? One right on front of engine behind serpentine, still no start. How can I check the injectors for power? Have oil and good pressure while cranking. Help please. I'll post an end to thread once fixed! Stranded at work!

Last edited by HoosierTwan; 04-14-2011 at 06:01 PM.
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Old 04-14-2011, 02:08 PM
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Did you check for codes?? Possibly the suply of fuel some how quit.
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Old 04-14-2011, 02:11 PM
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there aren't any check engine lights....could it still have a code? I'm going to track down a code reader. Anyone with help feel free to call/txt
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Old 04-14-2011, 02:24 PM
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Check the mega fuses under the hood again. #30 PCM and fuel heater.

Could be the IDM, but I havent heard of one that stops working all together, usually causes 1 bank to stop firing.
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Old 04-14-2011, 06:09 PM
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Soo guys, realized what i changed was the cam sensor....unless they gave me a faulty one, I'm still up a creek. Double,triple checked my maxi fuses. They are all good. My code reader showed 0. Had a buddy check with a fancy snap on one, pulled some codes. Cam circuit showed up, IDM, and high bank 1. Something about causes being a faulty IDM, PCM, or grounded circuit (blown fuse)....this is what I was afraid of. Bad brains. But as someone mentioned, would have just gone kaputt like that? No warning, like a light switch, and I was literally idling along, no load, so it wasn't jolted.

WHAT'S NEXT?

Is there a way to check either the ecm or idm? without just swapping parts?
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Old 04-16-2011, 04:32 AM
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Still down. Any insight from anyone? Got the truck back to my house now, last scanner pointed somewhat to IDM. I can't believe it just want bad in an instant without warning. Anyone know where I can get one to try? I really would think this has got to be electrical and something caused me to lose my injectors. Any help would be greatly appreciated. About to give up on this truck. It's a 97 with only 140k on it and in excellent shape. First the GPR (no big deal), then the brake lines (no big deal), then the batteries, then the starter (still not a huge deal, understandable) and now this. All in about 6 weeks time. . .grrrrrrrrrrrrrrr
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Old 04-16-2011, 04:44 AM
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cam position sensor is always a good one to go at first on a 7.3
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Old 04-16-2011, 08:00 AM
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Does your "Wait To Start" light come on? Was the sensor you replaced down on the bottom?

BTW, where are you from? Going by your user name, somewhere in Indiana?
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Old 04-16-2011, 02:41 PM
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Wait to start light does come on. I get good oil pressure while cranking. No blown fuses. Already changed the cam sensor, unless it was bad, but it is seated correctly. Hoping to get my hands on a good IDM or find a truck that someone would let me try mine in to see if it stops theirs from starting. If it seems to be good still, then I guess I'll eat another cam sensor and put a new one in again. Is there anything else I'm missing

Yep, in northern Indiana. Right in the middle in Goshen, IN. If anyone could help PM me and I'll get you my phone number. Thanks in advance
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Old 04-17-2011, 06:40 AM
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Just found the GB Tech Bulletin on testing out injector wiring prior to installing a new IDM. Should I assume if everything passes as good, and CPS has been changed...I'm looking at a faulty IDM? Still working on it. . .why is it that every thread I see on this issues usually just stops with no answer? Once I get it licked I'll for sure have a final posting explaining.
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