6.0 having running issues
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Senior User
Joined: May 2004
Posts: 309
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From: Stewartstown, Pa
6.0 having running issues
05 f350 with sct tuner (studded and deleted) with blue spring mod. And for the record I took the truck back to stock tune
Having an issue where after a long hard run, or a run up a hill, the truck starts running rough and acting like its not getting fuel. Sometimes it runs so bad it dies. Wait a few seconds, start her up and it runs fine. (until I do a hard pull again) I can hear a intermittent slight miss at idle as well at times. Tank is 3/4 full of fuel. No codes, no CEL. Also there is no smoke when this happens. just took her for a run and it happened, brought it back and shut it off, started it back up and idles fine.
Oil pressure seems good, can't remember exact numbers but it was in the 2000's I think even while it was dying. FICM voltage holds steady at 48 volts.
I changed the fuel pump and filter out to a different one. (a used one that was working when removed from a different truck) no change. I did not change the upper filter but it doesn't look bad.
I imagine a fuel pressure test would be in order but I do not have the equipment right now to do it. Am I right thinking its a fuel issue?
Having an issue where after a long hard run, or a run up a hill, the truck starts running rough and acting like its not getting fuel. Sometimes it runs so bad it dies. Wait a few seconds, start her up and it runs fine. (until I do a hard pull again) I can hear a intermittent slight miss at idle as well at times. Tank is 3/4 full of fuel. No codes, no CEL. Also there is no smoke when this happens. just took her for a run and it happened, brought it back and shut it off, started it back up and idles fine.
Oil pressure seems good, can't remember exact numbers but it was in the 2000's I think even while it was dying. FICM voltage holds steady at 48 volts.
I changed the fuel pump and filter out to a different one. (a used one that was working when removed from a different truck) no change. I did not change the upper filter but it doesn't look bad.
I imagine a fuel pressure test would be in order but I do not have the equipment right now to do it. Am I right thinking its a fuel issue?
Mountain Pass
Joined: Oct 2015
Posts: 235
Likes: 2
From: Central BC
I don't have any gauges yet, so I'm going from memory as to what my mechanic said. And I'm a total newb so take this fwiw. IIRC it was reading 350 with the engine off, meaning it was giving a higher reading than it was actually getting when the engine was running. Other systems were fooled by the artificially high number.
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Senior User
Joined: May 2004
Posts: 309
Likes: 1
From: Stewartstown, Pa
Pulled the tank. When I pulled the (blue) feed line it was stuffed full of crap. Pulled the pickup and the whole bottom is broken off. (was just 2 tubes going down, all the parts are in the tank) pretty sure that's my problem.
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JW1971
1987 - 1996 F150 & Larger F-Series Trucks
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Nov 12, 2014 10:16 PM
