Sudden Issues with Turbo (Vane Control) - Ford Powerstroke Diesel Forum
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Old 09-04-2013, 07:46 PM
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Sudden Issues with Turbo (Vane Control)

Hello, My name is Mike and Im new to the forum. I have browsed around often but never needed to post anything.

Vehicle is a 2005 f350

Problem Started all of a sudden.


I am familiar with turbo vehicles but this is my first turbo with the Veins. From my understanding they act as a wastegate.


The problem started after I was out in the country and hit a lot of puddles and got things a bit wet/muddy. The problem started after a large puddle and since it comes and goes. I took off the harness to the controller on the top of the turbo to check for water and there was nothing in it. I sprayed wd-40 while it was off.

With the harness plugged in: turbo boosts as it should but it seems as if its not making it to the motor. At idle it sounds like a jet dryer at a racetrack. While driving it has no power, the turbo spools and builds boost as it should but it seems like it doesnt make any power.

With it plugged in: the idle is quiet like normal. The turbo does not spool much unless you get harder into the throttle. If your hard in the throttle it will eventually spool and build full boost, but it lacks low end power.

I believe this is the problem since the exhaust note is different as well. I'm just not sure if the sensor on top of the turbo is what I should be looking into.

Any help is appreciated as I have to tow my car back from the dyno this week.

Thanks,
Mike
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Old 09-04-2013, 09:20 PM
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I would suspect a torn cac boot, probably one of the lower ones.
Possibly even cracked the bellows pipe of the y-pipe on the exhaust.
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Old 09-05-2013, 01:39 AM
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What is a cac boot? An exhaust leak would cause the problem? Truck doesn't sound like an exhaust leak, just sounds different out the exhaust since the vanes are not working properly.
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Old 09-05-2013, 02:14 AM
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Quote:
Originally Posted by AWD4g63 View Post
What is a cac boot? An exhaust leak would cause the problem? Truck doesn't sound like an exhaust leak, just sounds different out the exhaust since the vanes are not working properly.
Yes an exhaust leak will cause a loss of boost. Try looking on the up pipes going to the turbo.

CaC boot. Cold Air Charger boot (intercooler boot) if this has come off or is torn/ripped you will have no boost also. This is probably your problem.

And yes the VGT turbo has variable veins that help with boost and control boost. When idling the veins are almost closed and this is what gives the 6.0 the turbo whistle or whoosh. Normal. Nothing to be alarmed about. Our trucks do not have a waste gate and the veins control excess boost. Hope this helps

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Old 09-05-2013, 04:45 AM
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Thanks for the help! I'm leaving towards a blown pipe or coupler. Ill do a boost leak check.
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Old 09-05-2013, 05:07 AM
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Quote:
Originally Posted by AWD4g63 View Post
Thanks for the help! I'm leaving towards a blown pipe or coupler. Ill do a boost leak check.
You can look at the CAC boots and feel around them pretty easily and tell if one is torn or blown out/off. Good luck

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Old 09-05-2013, 07:48 PM
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Now that I think of it. A blown pipe would cause the issue at all times. The truck will drive with little power and then you will hear the exhaust note change and it drives like normal for a few seconds or minutes.
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Old 09-07-2013, 02:26 PM
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Did a pressure test just to rule it out. Had a small leak I repaired but still have the same issue. No exhaust leaks anywhere.

What to look into now?

Thanks
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Old 09-07-2013, 08:45 PM
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possibly a faulty vgt solenoid.... You have no exhaust leaks if you are building boost... Period. Look into the vgt solenoid, ran into the same type of problem recently with a truck
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Old 09-08-2013, 07:01 AM
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Is the the solenoid on top of the turbo? Is there a way to test them?

Thanks
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