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Apr 22, 2013 | 12:03 PM

ConorsTowing

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Hi I have a 2001 F250 with the 7.3 in it. It's getting fuel and air but doesn't wanna start it just cranks I went to start it up in the morning yesterday and as it was warming up idle got rough and 10 seconds later, it stalled out now it wont start. scanner is showing p0603 p0470. Tach doesn't move while cranking. I was thinking about crankshaft pos sensor? Don't have much money to try different things thats why I'm asking for help. Thanks, Conor

Apr 22, 2013 | 12:25 PM

01PS

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From: Sandia Park, NM

No tach = CPS. Grab a 10mm wrench and have at it!

Apr 22, 2013 | 12:29 PM

ConorsTowing

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Thats what I thought, just wanting to get some reassurance Thank you

Apr 22, 2013 | 12:59 PM

Brother Les

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From: BoCoMo

P0470 Exhaust Back Pressure Sensor Circuit Error

P0603 Internal Control Module KAM Error

Apr 22, 2013 | 02:36 PM

ConorsTowing

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I changed the cps and it fired up but it has a rough loping type idle. Real rough idle

Apr 22, 2013 | 03:06 PM

Justin@DP-Tuner

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Quote:

Originally Posted by ConorsTowing

I changed the cps and it fired up but it has a rough loping type idle. Real rough idle

Where did you get the CPS from?

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Apr 22, 2013 | 03:17 PM

ConorsTowing

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advance, closest ford dealer is like 40 miles away it was bwd brand. I live in the sticks

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Apr 22, 2013 | 04:00 PM

BillyBob69

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Joined: Jul 2003

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From: Wheatland, Mo

Have you checked the oil level for the engine and the HPOP?
If they are low and being that the engine uses high pressure oil to run your injectors....