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What could it be?

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Old Oct 6, 2008 | 11:06 AM
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What could it be?

My truck (2006 F250 w/ manual tranny) is having some issue.......it shakes/hesitates (don't know what word to use) when accelerating. It seems to do it around 1500-2000 RPM's. Instead of the RPM's going up smoothly, they jump up in little bursts. It doesn't seem to have a lack of power, and when it starts doing it, I can give it more throttle and it will stop. Also, it's really bad when I first start the truck and it hasn't warmed up yet. At first it would only do it when it wasn't warmed up or going up a hill, but now it does it pretty much all the time. At first I thought it was a tranny issue b/c it started doing it right after I changed the tranny fluid (also did fuel filters and oil). I ended up changing it again to see if that would correct the problem, but it didn't. I also thought it could be the clutch, but I don't think it is anymore. Possibly EGR sticking? What do you guys think?

Thanks
 
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Old Oct 6, 2008 | 11:08 AM
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sounds like a fuel issue to me
 
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Old Oct 6, 2008 | 11:13 AM
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possible skip? depending on how you are accelerating, the engine could be in a sweet spot for an injector to sssttttuuudder
 
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Old Oct 6, 2008 | 11:18 AM
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it does it when i don't accelerate very hard.......if i really get into it, it won't do it
 
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Old Oct 6, 2008 | 11:20 AM
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I wonder if the egr is to blame. You know it is open durning normal excel, but closes during WOT. Maybe time to clean it up.
 
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Old Oct 6, 2008 | 11:21 AM
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sounds like a skip. a straight drive can load a engine up more than a automatic. go to your dealer, and see if they can rd test with you to find out if it is a actual skip.
 
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Old Oct 6, 2008 | 11:21 AM
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try unpluging the EGR with the key off, and in your pocket when you unplug it. That will keep the EGR from opening. See if that helps any
 
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Old Oct 6, 2008 | 11:24 AM
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Originally Posted by BowTieHatr
sounds like a skip. a straight drive can load a engine up more than a automatic. go to your dealer, and see if they can rd test with you to find out if it is a actual skip.
Wouldn't a dealer get pissy b/c I have a straight pipe exhuast?
 
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Old Oct 6, 2008 | 11:27 AM
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if it is in fact an injector skipping, that means time to replace that injector, or all have to be replaced?
 
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Old Oct 6, 2008 | 11:32 AM
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Originally Posted by tippmann87
Wouldn't a dealer get pissy b/c I have a straight pipe exhuast?
its possible but why did the straight pipe cause the injector to fail? um it didnt and if they say it did find a new dealer.

Originally Posted by tippmann87
if it is in fact an injector skipping, that means time to replace that injector, or all have to be replaced?
the dealer can only justify replacing the parts that are bad/failing. ford has REALLY tightned up on warranty money. we are getting hit with atleast 2500 a month in chargebacks because ford says we are overrepairing.
 
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Old Oct 7, 2008 | 02:28 PM
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Is there any way to fix a skipping injector other than replacing it?
 
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Old Oct 7, 2008 | 04:41 PM
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I think having a new injector in place will isolate that problem.
 
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Old Oct 7, 2008 | 04:47 PM
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Originally Posted by tippmann87
Is there any way to fix a skipping injector other than replacing it?
I wonder if Hot Shots Secret would be a worthwhile expense on this? It's got a relatively good reputation. IDK, but here's the URL just in case... Lubrication Specialties | Diesel Motor Oil | Primrose Engine Oil | Fuel Additives | Oil Additives | Engine Restore|
 
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Old Oct 7, 2008 | 06:31 PM
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Originally Posted by ozx3+1
I wonder if Hot Shots Secret would be a worthwhile expense on this?|

snake oil doesnt FIX a truck, never has never will. snake oil only hides the true issue. i dont care if it is hot shot or hot sh-t, it only hides the truth.
 
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Old Oct 7, 2008 | 08:10 PM
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Do you notice any smoke out the exhaust when it studders? If so, what color?
 
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