Real Bad Turbo lag ? - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 11-23-2009, 07:03 PM Thread Starter
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Real Bad Turbo lag ?

My buddy just bought a 04 f350 with 56000 miles. It is all stock besides a Magnaflow turbo back exhaust. NO tune or anything yet. I dont know if it is just me or if there is something wrong. In my opinion it feels like a very long delay for the turbo to spool and make power. it could just be me and my lack of driving with no tune but it seems slower then i remember.

Any ideas of what could cause excessive turbo lag?

also, its not blowing any smoke white or black.

thanks


2008 ECLB FX4 all stock
Planning on: Spartan, full 5", EGR delete, 6"on 37's
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post #2 of 8 Old 11-23-2009, 07:35 PM
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turbo sticking perhaps?

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post #3 of 8 Old 11-23-2009, 07:40 PM
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what about a restricted air filter,or wast gate not working properly?
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post #4 of 8 Old 11-24-2009, 08:11 AM Thread Starter
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would it be worth it to get a new flash? and see if that helps.


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post #5 of 8 Old 11-24-2009, 07:18 PM
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It wouldn't hurt to get the latest calibration, but I think your problem has to do with your turbo being sooted-up. You may have to pull it off, and clean it.

BTW, Panhead Jay, the 6.0l doesn't have a waste gate, it has a variable geometry turbo. It has a bunch of moving parts that direct the exhaust gasses to run the turbine more effectively. They get rusty and sooted-up and don't work really well.

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post #6 of 8 Old 11-24-2009, 09:38 PM
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Sounds like the vanes are sticking. Remove it and clean it. Everything you need is online. Don't forget to add anti-seize to the unison ring and the bearing housing side of the turbo. Buy some carburator tune-up cleaner, something sensitive for the vgt actuator and give that a good spray down. Careful to not damage any of the parts. Buy the hardware kit and replace the 0-rings and oil feed line gasket as necessary. It's really not a difficult job. The only tool that saves me the most time was a 7/16th ratchet wrench for the v-clamps on the exhaust housing. Make sure the exhaust uppipe is seated properly before clamping the pipe when you reinstall it.

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post #7 of 8 Old 11-25-2009, 07:31 AM Thread Starter
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thanks for the info. I will let my buddy know we need to clean his turbo. Is this common for a truck wiht 56xxx miles on it?


2008 ECLB FX4 all stock
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post #8 of 8 Old 11-25-2009, 08:00 AM
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Yes perfectly normal for 56k.

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