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6.0L Powerstroke Technical Discussion Technical info, repair and non performance related discussion for the 6.0L Power Stroke engine here.

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Old 01-05-2010, 07:01 PM
Paxton96bear Paxton96bear is offline
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Thumbs down 6.0 F250 Rough Running

Sorry for the long post but here is goes:

1. Cold starts are terrible. Truck idles very rough and sounds as though a cylinder or two are not firing every revolution. (When it is really cold, there is some white smoke associated with starting but this isn't the norm)

2. Let it warm up for 10 -15 minutes and still idles rough. When taking off initially there is no power. Once it warms up then I don't have this problem. No smoke.

3. While driving--when i punch it i can tell that all cylinders are not firing all of the time as there is a surge and then a lag and then a surge.

4. While driving in overdrive--truck will act as if it is missing when going up a hill or accelerating gently. When it downshifts this symptom goes away.

5. Fuel Filters were changed 8k ago.

6. NO check engine light is on.

Any thoughts?
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Old 01-05-2010, 07:10 PM
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gregrob gregrob is offline
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Plugged EGR or bad injectors...

I would have a contribution test ran on the injectors to see how healthy they are and go from there.
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Old 01-05-2010, 08:59 PM
Paxton96bear Paxton96bear is offline
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Took off EGR valve and had some deposits on it. Cleaned it really well and put it back on. Truck started easier but still have a vibration at about 2000 rpms. When driving still have a miss in overdrive. Better but not fixed.
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Old 01-05-2010, 08:59 PM
Paxton96bear Paxton96bear is offline
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would replacing the cam sensor help?
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Old 01-07-2010, 10:27 PM
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1snotrocket 1snotrocket is offline
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The cam sensor will normally set a code when bad.How is your coolant Level?My 1st thought would be possible head gasket starting leak.When the block is cold the coolant weeps past the head gasket.When it warms up the metal expands and helps seal the weep or small leak in the head gasket.
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Old 01-09-2010, 12:22 PM
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Its likely your injectors are sticking. This is what I use to prevent this from happening. This along with a good synthetic oil will help you out down the road. Depending on how far gone the injectors are it may or may not help. Also run a good fuel additive to lubricate and clean the fuel side of the injectors. Ash less two stroke oil is also a good additive. Go to 3k oil changes for awhile. 5k max. Worst case is you'll need to replace the injectors.
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Old 01-15-2010, 01:42 PM
Paxton96bear Paxton96bear is offline
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I haven't noticed any coolant loss. The problem seems to be getting worse on initial start up. The truck just won't go until it heats up about 10 minutes or so. Has a very difficult time shifting as well when it is sputtering and lugging for the first 10 minutes of a drive.
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Old 02-13-2010, 05:59 PM
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Diezel Dawg Diezel Dawg is offline
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When u cleaned the EGR, did you work it back and forth to make sure the spring is working properly. There is more to it than just cleaning it
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Old 02-13-2010, 06:40 PM
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WhiteDuallyIL WhiteDuallyIL is offline
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bad injector or 2 get a scanner and clear all the codes after you write them down. Now drive the truck for 10 miles re check codes il bet you 100 bucks you have at least a code for cylinder contribution which means that injector is bad. recheck another time or 2 and the same cylinder keeps coming up theres your injector. NOW if you recheck and it keeps coming up with a different cylinder your FICM maybe bad check the votage it should be 48 volts and check the voltage anyway to see that.

Trust me I just worked on another 6.0L yesterday my 2nd in 3 weeks yesterdays had 4 bad injecotrs and smae symsoms.
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Old 02-14-2010, 05:58 PM
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2006nytro 2006nytro is offline
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what diesel dawg said check you egr
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