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Old Nov 22, 2004 | 07:15 AM
  #1  
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alopez2
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Truck stuttering/missing

I have a 2002 f-350 7.3L PSD 76,000 miles I changed the oil in it on Friday now it stutters when you slow to go around a corner and then pick up the throttle again. also if you are going like 65 or so down a slight grade and your giving it very little throttle input it stutters or misses something no sure. Should I change fuel filter? New to diesel.
 
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Old Nov 22, 2004 | 04:52 PM
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Does it studder at idle, or just when applying the throttle?
 
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Old Nov 22, 2004 | 06:14 PM
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I have heard the wrong wieght oil will make these things run bad. What did you put in it?
 
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Old Nov 23, 2004 | 05:46 AM
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It Does stutter under idle only sometimes not all of the time.

I put in Shell Rotella 15w 40w.
 
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Old Nov 23, 2004 | 03:57 PM
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I would change the fuel filter and clean the fuel screen do a search on this site for it. A fairly easy thing to do, also try some diesel kleen. Diesel kleen is a diesel fuel additive that cleans and lubricates injector, can be found at most auto part stores. Hope this helps and fixes your problem.
 
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Old Nov 23, 2004 | 07:21 PM
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Just wondering if the throttle position sensor might be starting to give up the ghost...possible short in the potentiometer?
 
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Old Nov 23, 2004 | 08:27 PM
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I have similar things going on and they have replaced 1/2/8 injectors with no relief. Any ideas would be appreciated.
 
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Old Nov 24, 2004 | 04:10 PM
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OK guys replaced the fuel filter and it was still stuttering and missing so I drove it to the gas station filled it up drove home and now it is gone! So would a bad tank of diesel cause this? or do I have a fuel supply problem when tank is low? Or is it just in remission for the time being?
 
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Old Nov 24, 2004 | 04:20 PM
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mybigredford
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i have the same problem alopez, well it sounds the same, except it happened after i changed the fuel filter, not before, but i have been running it and havent had any problems, that was maybe like 6-7 months ago. i was wondering about the throttle sensor going on mine, the other day i was going up a hill and punched it, and when i started to back off the go pedal it seemed to stick. is it hard to change the TPS?
 
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Old Nov 24, 2004 | 05:54 PM
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Domino'sDiesel
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A bad tank of fuel would definetly cause those symptoms. Are you using any additives?

As for the TPS very easy to replace I think two screws and a wire harness attach it.
 
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Old Nov 26, 2004 | 08:42 AM
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Allright guys, it came back but not the same. It now only stutters when it is cold!! (I am plugging it in) after it gets to operating temp. it seems to go away I have no idea what it could be, bugging the crap out of me though. why did this start to happen only after I chaged the Oil like within 2 miles on the new oil not before oil change? Help please!!! Tank is still full. CPS???

New oil & filter
New air filter
New fuel filter


Afe stage 1, 4 inch exhaust, chip, guages.
 
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Old Nov 26, 2004 | 08:52 AM
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Did you get a lot of water out of the fuel/water separator when you changed the filter?
 
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Old Nov 26, 2004 | 08:55 AM
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There was about an 1/8 of an inch of the bottom of a mayo jar that looked like it had water. Iam running diesel Kleen white bottle every fill up.
 
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Old Nov 26, 2004 | 09:06 AM
  #14  
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I would consider replacing the CPS next, possibly look into the Injection Control pressure sensor and ICP requlator. This is what I would do, but I'm not a mechanical expert... I just know a metric crescent wrench when I see one! Good Luck and keep posting... I always learn something new on this site... Thanks
 
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Old Nov 26, 2004 | 09:19 AM
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From what I've read the CPS kills the engine, like turning the key off. What does your tach do when the stutter occurs?
 
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