6.0 hesitation - Ford Powerstroke Diesel Forum

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post #1 of 69 Old 01-02-2010, 07:50 PM Thread Starter
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6.0 hesitation

Long time listener, first time caller. I recently bought an 06 F250 PSD with 137k miles. I've searched for weeks in the forums and I'm still just as lost. So here goes... When I first test drove this truck I noticed a "miss" or hesitation. My father convinced me that I could put Power Service cleaner in it and it would probably clear up. Well I drove this thing to Florida and hauled a car back. Nothing has changed or "cleared up".(thanks dad) It starts hard on cold mornings, puffs a little white smoke, and sounds like a loud rattle.(yes, plugged in) After about 15 seconds that clears up and it idles fine. The main problem I'm having is a hesitation while driving whether it's cold or warmed up. During slight acceleration it seems like it's surging and I can see a puff of white smoke from the exhaust when it hesitates. It's not constant and seems worse when first starting out. At highway speeds when I set the cruise or hold a certain speed it jerks like a bad miss in the engine.(especially going up hills) At a stop, if I put it in gear and hold the brake and hold the RPM's about 1100 or above it "misses" then clears up then "misses" and so on... At WOT it kicks down and takes off with no problems. I've put 2500 miles on it and it's never thrown a code yet. My in town mileage is about 9mpg. The Ford dealership I bought it from said the only thing they changed was a sensor on the fuel tank. I tried to get them to fix the hesitation before I bought it. They opted to sell it to me for a good price and let me figure it out. I removed and cleaned the EGR valvle. Replaced both fuel filters. Nothing has helped yet so where do I go from here?

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post #2 of 69 Old 01-05-2010, 07:31 PM
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i dropped mine off at the shop today for the same thing but when it stumbles it puffs black smoke. it only does it running around 70 mph slowly speeding up. Took guy for ride didnt throw a code but he had it on a comp and said he thought it was a mis in cyl #2
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post #3 of 69 Old 01-06-2010, 01:01 AM Thread Starter
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let me know what it turns out to be. i noticed yesterday that it was dumping white smoke when it hesitated at slow acceleration.

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post #4 of 69 Old 01-06-2010, 01:02 AM
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Sound like you have a bad injector and your turbo veins are gummed up

The Mullet Mod
Stock 2005 F-350 4x4
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post #5 of 69 Old 01-06-2010, 04:24 PM Thread Starter
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will you be able to hear any kind of difference in the turbo if the vanes are sticking?

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post #6 of 69 Old 01-06-2010, 06:13 PM
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can the veins be cleaned?

Patrick
2003 F250 CC 6.0 XLT FX4
leveling kit
FBD 4 inch exhaust
285 BFG's on Eagle wheels
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post #7 of 69 Old 01-07-2010, 02:50 PM
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My problem was a sticking egr valve
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post #8 of 69 Old 01-07-2010, 02:54 PM
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Quote:
Originally Posted by PatsPSD View Post
can the veins be cleaned?
Yes they can be

There are instructions around here somewhere
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post #9 of 69 Old 01-07-2010, 04:40 PM Thread Starter
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i have an air intake on it so i can hear the turbo pretty clear and it sounds pretty good to me. if the vanes are sticking won't you hear the turbo doing something it shouldn't?

will it hurt to unplug the egr and drive it to see if it makes a difference?

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post #10 of 69 Old 01-08-2010, 11:47 AM Thread Starter
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ok so i unplugged the EGR and it seemed to clear up. i drove it about 10-15 miles around town and it never hesitated. i stopped at the grocery store, came out half an hour later, fired it up and the check engine light is on. i was expecting that, but i pulled onto the road and it's back to dumping smoke and hesitating during acceleration. i stopped and plugged the EGR back in and nothing changed. the smoke looks more blueish when it's really coming out.

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