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post #1 of 8 Old 03-19-2009, 01:10 PM Thread Starter
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Any Thoughts

Hello,
I have a 2001 f-350 7.3 turbo with about 150k miles on the way home the check engine light came on and motor turned sluggish (almost like it was running out of fuel) started sputtering black smoke and egt was 800 to 1000.
I read the code and got P0521. i searched and found the code to be engine oil pressure sensor.
Where to i go from here
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post #2 of 8 Old 03-19-2009, 01:17 PM
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Check the engine oil level. If its low the injectors wont work like they are supposed to. Hook up a mechanical gauge where the oil pressure sender is and read what actual pressure is.

single turbo'd 6.4
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post #3 of 8 Old 03-20-2009, 06:49 PM Thread Starter
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So I topped off oil and let motor completely cool. Starts fine runs fine for about 20 min once it gets to normal operating temp it throws the service engine light and the same code. p0521.
My question is do you think i'm looking at a bad engine oil pressure sensor or could it be my dreaded thought which would be injectors?
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post #4 of 8 Old 03-22-2009, 04:37 PM Thread Starter
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Just changed all filters air, oil and fuel. Oilchange.
In addition is there a fuel filter behind the air intake? there is a canister type fuel filter I can see. Can anyone tell me if i'm correct on that ?

So now i'm back to my old problem she starts fine and idles fine. When she gets to normal operating she throws the check engine light and same code. sounds like 3 or 4 cylinders shut down. and you have to wait for a complete cool down to get it back to idle..

I pulled the eop sensor and she looks clean as a whistle.
Please powertrokers give me some ideas. i'm on a tight budget and i'm trying to narrow this down.
Thanks in advanced for any help
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post #5 of 8 Old 03-22-2009, 04:40 PM
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i had the same sypmtoms about a year ago with my 7.3. ended up being the IDM was dying.

if you see a light at the end of the tunnel, it's probably just a photon torpedo
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post #6 of 8 Old 03-22-2009, 04:43 PM Thread Starter
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idm huh did you go with after market of oem replacement
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post #7 of 8 Old 03-22-2009, 04:59 PM
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Quote:
Originally Posted by jdavey5454 View Post
idm huh did you go with after market of oem replacement
at the time i replaced it, i was unaware of any aftermarket IDM. so, i went with the OEM replacement from Ford. $1100

if you see a light at the end of the tunnel, it's probably just a photon torpedo
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post #8 of 8 Old 04-04-2009, 12:59 PM Thread Starter
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it was a bad wirirng harness that caused the problem. then there was a voltage issure and i changed out the icp. Runs like a raped ape again. Thanks for the advice
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