fuel filter?
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From: house springs,mo
if its and injector problem,there probably not all bad!And i would stay away from the remans!jmo
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From: house springs,mo
u could remove one valve cover at a time,then start the truck and remove the electrical connection one at a time at each injector,and if the one you removed made the truck quite.then u may have found the problem! Its not a bad idea thats how i found what injector was bad on my truck!
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From: Parker, CO
IS it knocking more on the drivers side or the passengers side. It could be #8 injector not getting enough fuel. The sound would go away when you have the tuner because your putting more fuel in. I would try the CPS. Have you noticed the engine running differently or is just a sound change?
Postmaster
Joined: Sep 2004
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From: Bellingham, WA
When you had the predator in, did you run the crap out of the truck? I'm wondering if maybe you need to re-torque the injectors? Start small man, these trucks are tough. Dont go any furthur that necessary.
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From: Near DC
By any chance, did you get a gray CPS? There are known problems with it and the mother ship is "looking into it".
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Posting Guru
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From: Tupelo,Ms
im gonna do a black cps and new fuel filter today... I didn't run the crap out of the truck with the diablo. this noise started before winter fuel got here. it used to really knock and i changed the oil and it stopped. i also added the hpx and it helped a little. its still sounding like a constant clattering it wont do it in park while your revving its only moving down the road and responds as i push the go pedal so im just gonna keep checkin things off i guess
Senior User
Joined: Feb 2008
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From: Cape Girardeau, Missouri
What about a cracked flexplate? I'm not sure if this is a problem in the Ford's or not, but the Dodge Cummins are notorious for cracked flexplates that makes it sound like the engine is coming apart. Just a thought????
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From: Tupelo,Ms
good idea scott... that would be one of my last things to look at... I got my fuel filter but the cps was 112 and wasnt black.. it was a IH but it was grey/black so i didnt know if it was the right one.. didnt have time to do the fuel filter i was tied up with a cummapart all day
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From: Tupelo,Ms
well put in a new fuel filter in today and its helped most of the racket! heck for 18 bucks i may do a fuel filter every oil change and make it a even 100.00 service ha ha anybody know bout that cps? the black/grey one good or no it is a IH
Post Fiend
Joined: Feb 2008
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From: Lancaster, Pa.
Got this part no# from F-350 Chris off his thread, he did some research on the two,IN black CPS part #1825899c93 or the old black CPS part #1821720C99. I got the gray in mine and i,m getting a black one to switch out. Gray for the glovebox.