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7.3 cutting out

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Old May 14, 2014 | 07:38 PM
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7.3 cutting out
My 97 ford f350 7.3 cutting out got in it this morning to run out and it died and now wont start
 
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Old May 14, 2014 | 08:32 PM
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Originally Posted by new7.3owner
My 97 ford f350 7.3 cutting out got in it this morning to run out and it died and now wont start
Need some more info. Fresh oil? Had it come to temp when it did it? Will it re start when it cools down? Have you checked fuel psi while cranking? Do you have wait to start? Does the tach move while cranking? Smoke out of the tailpipe while cranking?

Welcome to FTE!
 
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Old May 14, 2014 | 09:28 PM
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Sounds like it could be a CPS...
 
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Old May 15, 2014 | 10:55 AM
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It has fresh oil in it the tach moves a little when cranking I dont have a way to check the fuel pressure and the wts light still comes on and no smoke while cranking
 
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Old May 15, 2014 | 12:12 PM
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If the tach doesn't go to 200 it won't start.

This sounds like a CPS failure.
 
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Old May 15, 2014 | 01:06 PM
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I had a friend hook his scanner up to it when it was cutting out it said the idm do they just go out or do they go bad and eventually go out
 
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Old May 15, 2014 | 02:03 PM
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What was the code the scanner retrieved? There are several that relate to the IDM, and don't necessarily mean the IDM is the cause of the problem. When the truck died, did it sputter out, or was it like the key had been shut off?

The PCM needs to see 500 psi ICP, 100 RPMs and no less than 7.5 volts to send a fuel delivery command signal to the IDM. The IDM may need a higher voltage to operate.

A problem with the HPO system, such as bad ICP sensor or stuck IPR can prevent the PCM from seeing 500 psi of ICP. A bad cam position sensor will prevent the PCM from seeing RPM. Obviously, dead batteries will cause a low voltage reading.
 
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Old May 15, 2014 | 02:19 PM
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Idk what code it threw up but it just shut off like i turned it off
 
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Old May 15, 2014 | 02:24 PM
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Originally Posted by new7.3owner
I had a friend hook his scanner up to it when it was cutting out it said the idm do they just go out or do they go bad and eventually go out
IDM's do fail but not often. Usually it's water intrusion that kills them. Has it been raining hard there? You can take the IDM off the inside fender area and shake it to hear if water is sloshing around inside.

Without the error code it's a guessing game though.
 
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Old May 15, 2014 | 02:34 PM
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Originally Posted by tshrager
Need some more info. Fresh oil? Had it come to temp when it did it? Will it re start when it cools down? Have you checked fuel psi while cranking? Do you have wait to start? Does the tach move while cranking? Smoke out of the tailpipe while cranking?

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It has fresh oil in it the tach moves a little when cranking I dont have a way to check the fuel pressure and the wts light still comes on and no smoke while cranking
 
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Old May 15, 2014 | 02:37 PM
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Originally Posted by Hussler
IDM's do fail but not often. Usually it's water intrusion that kills them. Has it been raining hard there? You can take the IDM off the inside fender area and shake it to hear if water is sloshing around inside.

Without the error code it's a guessing game though.
I have a buddy that is going to hook up the idm to his truck to make sure the idm is bad or still good
 
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Old May 15, 2014 | 02:46 PM
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Originally Posted by new7.3owner
I have a buddy that is going to hook up the idm to his truck to make sure the idm is bad or still good
Good plan ...
 
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Old May 15, 2014 | 03:10 PM
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Originally Posted by Hussler
Good plan ...
What else could it be if its not the idm ive put a new cps on it and still wont start
 
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Old May 15, 2014 | 03:11 PM
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Originally Posted by tshrager
Need some more info. Fresh oil? Had it come to temp when it did it? Will it re start when it cools down? Have you checked fuel psi while cranking? Do you have wait to start? Does the tach move while cranking? Smoke out of the tailpipe while cranking?

Welcome to FTE!
It has fresh oil in it the tach moves a little when cranking I dont have a way to check the fuel pressure and the wts light still comes on and no smoke while cranking
 
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Old May 15, 2014 | 03:13 PM
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Originally Posted by Hussler
Good plan ...
What else could it b if its not the idm ive put a cps on it and no luck
 
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