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Old Jan 2, 2009 | 04:56 PM
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powerstroke problems

i have a 1997 f-350 powerstroke that is giving cyl/contribution codes but does not stick to the same cylenders when you run the test. i put 8 injectors in and still did not fix problem. it is missing at idle but not bad. when started up and reved up it stops at 2000 rpm and blows white smoke. smells like raw diesel. then clears out. when engin is hot it does not do it as bad. jason 832-647-3765
 
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Old Jan 2, 2009 | 05:16 PM
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so even after 8 new injectors it still throws cylinder codes? it will give you any code at random?

are you running a cylinder contribution test or are these stored codes? what kind of scanner are you using?

what brand injectors did you use for the replacements? new or used?
 
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Old Jan 2, 2009 | 07:16 PM
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when ever i run a contribution test it is always different cylenders. i used alliant injestors. new injectors do the same as old ones were doing
 
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Old Jan 2, 2009 | 07:22 PM
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What color is your Cam Sensor? If its gray you should order a Black sensor from Dp-Tuner and see if that helps.
 
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Old Jan 2, 2009 | 07:23 PM
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could be intermittent wire harness probs internal or idm or valve cover gaskets. but i dont no for sure
 
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Old Jan 2, 2009 | 07:40 PM
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i have new wiring harness and valve cover gaskets. my cam sensor is gray but i tryid a black one from the parts store still the same. what is weird is it dosent stick to the same cyl. how do u know if it is the idm?
 
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Old Jan 2, 2009 | 10:18 PM
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wow idk then , but it could be the idm but not sure on that one. mine ran fine then all of a sudden drop 4 cylinders just like that. to sounds like the idm spasin out every so often.
 
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Old Jan 2, 2009 | 11:52 PM
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it does it all the time but only cyl. codes. no body knows whats up. the truck is haunted
 
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Old Jan 3, 2009 | 09:34 AM
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Have you verified fuel pressures and ICP pressures are good? Also I would try a good CPS.
You can get one here
DP-Tuner

Or if you have a Navistar part counter near you you can get the same CPS there
The part number is 1821720C99
 
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Old Jan 3, 2009 | 09:47 AM
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Might try a compression check through the glow plug holes. There may be a few that are borderline. Your lookin' for 400psi.

Might clean the fuel pressure regulator screen. Check fuel pressure on the side of the regulator with a tire psi gauge that goes to at least 80psi. Should see at least 55psi at idle.
 
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Old Jan 3, 2009 | 03:39 PM
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compression is 450 on cylenders. i will check pressure with a tire gauge on schrader vaulve while at idle and get back to yall. where is the fule pressure regulator screen. if fule pressure was bad wouldnt it starve for fule going from 60 to 75 mph? it does not jump or stall when i do that it has good pick up. hell i dont know.
 
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Old Jan 3, 2009 | 05:00 PM
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i checked it with a tire gague and got 25 to 30 at idel what does that mean.
 
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Old Jan 3, 2009 | 05:05 PM
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that sounds a bit low but the tire gauge is a crude way to check it. they are desinged for air not diesel...lol.

how about some pid data, what is the icp at idle, and what is the ipr duty cycle?

here is a dumb question, and not to sound smart, but do you have the injector wires plugged into the correct injectors?
 
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Old Jan 3, 2009 | 05:32 PM
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Crude method or not, 25 - 30 psi too low. Sounds like it's time to shim the FPR and clean the screen.

Check the items Joe mentioned, too.
 
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Old Jan 3, 2009 | 06:14 PM
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i guess he has the wires hooked up right. but it was doing this before we went into the engin. how do u check the icp at idel and how do u find out the ipr duty cycle. what do u mean shim the fpr.
 
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