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2003 Ford F-350

Tiny
DARRYL REDDING
  • MEMBER
  • 2003 FORD F-350
  • V8
  • 4WD
  • AUTOMATIC
  • 57,000 MILES
Truck idles and runs rough. Also vibrates alot at low rpm driveing especially under load like going up hill.
Wednesday, October 27th, 2010 AT 8:48 AM

9 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
The check engine light should be on. Have it scanned and post the stored code numbers.
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Wednesday, October 27th, 2010 AT 9:14 AM
Tiny
DARRYL REDDING
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  • 6 POSTS
Thats the problem. Its not showing any codes. I've scanned numerous times with a good Snap-On scanner and no codes. The check engine light does light when you turn the key so the light does work.
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Wednesday, October 27th, 2010 AT 10:28 AM
Tiny
WRENCHTECH
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  • 20,757 POSTS
It's pretty hard for me to have any idea what is going on with some specific facts.
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Wednesday, October 27th, 2010 AT 10:31 AM
Tiny
DARRYL REDDING
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  • 6 POSTS
What specific facts do you need?
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Wednesday, October 27th, 2010 AT 1:15 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Something that verifies exactly what the situation is like specific cylinder misfire, lean, rich specific components setting codes, whatever. I can't see or hear it through my keyboard so I have nothing to base anything on beside your vague description.
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Wednesday, October 27th, 2010 AT 1:22 PM
Tiny
DARRYL REDDING
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Except for the tone of sarcasm, I apprieciate your time.
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Wednesday, October 27th, 2010 AT 1:25 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
I'm sorry for the tone but look what you gave me to work with.

Even misfires are tracked by the PCM and would set a code so that's not likely the issue either. We can't conclude anything without data on what the engine is or isn't doing.
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Wednesday, October 27th, 2010 AT 1:45 PM
Tiny
DARRYL REDDING
  • MEMBER
  • 6 POSTS
So if a vehicle does'nt show a code, it cant be fixed? Just looking for idea's on where to start. Is there a way to check the coils resistance to see if 1 is bad? Same for the TPS. How about fuel pressure?
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Wednesday, October 27th, 2010 AT 2:13 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
I'm not there. Where do we even start. We don't know if you have ignition misfire, lean condition, rich condition, timing issue. We don't even have a starting point. I can answer technical question but without trained eyes and ears on site, I have nothing.
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Wednesday, October 27th, 2010 AT 3:54 PM

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