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1994.5 - 1997 7.3L Power Stroke Diesel  

check engine light and rough idle

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Old Aug 3, 2009 | 11:09 PM
  #1  
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check engine light and rough idle

Last week I started my 95 F350 psd to go to work. I headed down the road and the cel came on and the engine ran rough for about a minute and then it cleared up. On the way home the cel was on most of the time and I had little power. Its down hill since.

I was overdue for a filter change and I cleaned the FPR screen. It ran fine for a few miles before the cel came on. Today I removed the FPR and soaked the screen in diesel clean but the problem is still there.

There is a small canister under the FPR and I read it has a filter. How do I get it off without removing the entire fuel canister?

What makes me think its a fuel problem is when I first start the engine, it runs normal for 2 or 3 seconds before the cel comes on and runs rough. Like it takes that long for fuel pressure to build up and dirt to plug the injectors.

Maybe I have an electrical problem. I'll check the connectors next. I had Autozone read the codes and there were none.

Thanx for any help you guys can give me.
 
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Old Aug 4, 2009 | 07:59 AM
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Fueling problems rarely set a CEL, , you can try unplugging the ICP connector ,see if it clears up , but you most likely have a burned wire under the valve cover.You can unplug the connectors one at a time , one of them won't have much effect on how the motor runs , that is the bad one...Cheap tests ...
 
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Old Aug 4, 2009 | 01:51 PM
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I'm new at this...so what is the ICP and where do I find it? I'll do the connector test to check for burnt wires under the valve cover. Do the wires come as a complete harness set for both valve covers, where do you get them and how much do they cost?
 
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Old Aug 4, 2009 | 02:44 PM
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From: Celaya, Gto. MX
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Wink

Originally Posted by lowcan
I'm new at this...so what is the ICP and where do I find it? I'll do the connector test to check for burnt wires under the valve cover. Do the wires come as a complete harness set for both valve covers, where do you get them and how much do they cost?
Check here, the maked with green is the ICP.
http://rides.webshots.com/photo/2042...63426583DtHcYL
BTW most AZ scanners dont read the PSD (power stroke diesel) codes.
 
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Old Aug 4, 2009 | 02:49 PM
  #5  
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From: Celaya, Gto. MX
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Lightbulb

Originally Posted by lowcan

There is a small canister under the FPR and I read it has a filter. How do I get it off without removing the entire fuel canister?
Check this pic to have a good idea, you have to unscrew it.
http://rides.webshots.com/photo/1080...39885334wGwdPf
 
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Old Aug 4, 2009 | 10:01 PM
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I have a burned wire under the valve cover. I unplugged to connector by the oil fill cap and the cel went out with no difference in how the engine ran. Any of the others made matters worse. Can I replace only the bad wire harness or do I have to buy a complete set? Where can I order on line?
Thanks for all your help.
 
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Old Aug 5, 2009 | 05:14 AM
  #7  
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From: Woodburn, OR
Originally Posted by lowcan
I have a burned wire under the valve cover. I unplugged to connector by the oil fill cap and the cel went out with no difference in how the engine ran. Any of the others made matters worse. Can I replace only the bad wire harness or do I have

You will need to replace the valve cover gasket and the wiring harness.

you can get parts @ rockauto.com or any ford in IH truck dealer.



1995 FORD F-350 SUPER CAB 7.3L 445cid V8 DIESEL FI Turbo (F) : Electrical-Connector : Fuel Injection Harness Connector Price Core Total
STANDARD MOTOR PRODUCTS Part # S697
w/ Multi Fuel Injection; w/ Centered Index Slot w/o Release

$6.10 $0.00 $6.10
STANDARD MOTOR PRODUCTS Part # SK25
w/ Multi Fuel Injection; w/ Centered Index Slot w/ Release

$12.55 $0.00 $12.55
STANDARD MOTOR PRODUCTS Part # S696
w/ Multi Fuel Injection; w/ Offset Index Slot; Bosch or Lucas Injector

$15.77 $0.00 $15.77
to buy a complete set? Where can I order on line?
Thanks for all your help.
http://rockauto.com/

1995 FORD F-350 SUPER CAB 7.3L 445cid V8 DIESEL FI Turbo (F) : Engine : Valve Cover Gasket Price Core Total
DORMAN Part # 615202 {OE Solutions #1379999, F4TZ-6584-A}
Direct Injection; Has Female Connectors For Fuel Injector

$55.89 $0.00 $55.89
FEL-PRO Part # VS50483R
Services one cover only; PermaDry® molded rubber gskt. incl.

$68.79 $0.00 $68.79
 
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