Question about 2003 Ford F350 Super Duty DRW SuperCab

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'03 F-350 7.3 Powerstroke cranks but doesn't start.

I bought a 2003 F-350 7.3 liter with 107k miles from an Arkansas wholesaler. I ran a CarFax on the VIN and it showed the truck as a one owner and no other info/history. Next morning won't start. "Gee, we didn't have any problems." My good mechanic diagnosed and replaced the following: Glow Plug Relay ($125) Injector Drive Module($777+$53!!!), Battery cable end, Fuel Heater, Fuel Heater Thermostat & Water Infuel Sensor. Checked glow plug resistance, Injector resistance- all were the same, Fuel Pump pressure 112 psi deadheaded, Both head rail were 60psi. $1527 total. Arky wholesaler refunded me $1030 even though I bought it "AS IS". My mechanic conferred with a Ford dealer diesel mechanic after all of this and he has no ideas. Still won't start except with a gasoline soaked rag in front of the air intake. Once it is started, it will continue to start throughout the day. Next day, cranks but won't start.
In the shop for 4 weeks, sittting in driveway for 4 weeks.

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  • rdm308 Nov 17, 2008

    Thanks FASTBOYZ. Dealer changed out the cam sensor as a recall item @ no charge.

    It started and ran great for two (2) days. Third day... no start. I bought and changed another cam sensor just to see but it didn't start. I'm thinking crank sensor or a wiring problem.

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With out doing alot of testing
we have found alot of cam sensors going bad in the 7.3 powerstrokes
i just had one in last week with a new sensor that only lasted a month

'03 F-350 7.3 Powerstroke cranks but doesn't start - 5a4633f.jpg

Posted on Nov 03, 2008

  • paul erickson
    paul erickson Nov 17, 2008

    there should be a engine code set .

    we would be just guessing without this information.

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You have to check the oil pressure coming from the high pressure oil pump!you need 700lb oil pressure to the injectors ! you have to check through the icp port! also check ur ipr valove the screws into the high pressure pump!! hp pump is located in the galley in the front of engine!

Posted on Mar 17, 2010

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One thought comes to mind,  my 2000 model 7.3 would hardly start and had no response to throttle, would sputter and die.  the fuel injectors in my model work off of oil pressure.  I was low on oil due to the oil filter not being tightened completly.  changed oil, had new oil filter properly installed and presto, problem fixed.  never ever have i had any other problem with this truck, give it a triple a rating.  hope this helps.  

Posted on May 02, 2009

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