Sounds like a really bad turbo cough - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 09-21-2009, 11:20 AM Thread Starter
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Sounds like a really bad turbo cough

2004 f350 6.0 (my every day driver and its monday and broke down NEED HElP!!)
I had low turbo boost so the dealer said it was a leak in the y pipe or also called a up pipe.I took the truck home, and took the intake off, turbo out ect.. and replaced the y pipe. Got it all back together. Now when i take off after about 2 miles or if the truck is warmed up tuck cuts out and sounds like the turbo is blowing air back throw the air filter. I really need help with this and i am open to any ideas!

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post #2 of 7 Old 09-21-2009, 04:38 PM
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post #3 of 7 Old 09-21-2009, 04:44 PM
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Did you do the VGT relearn after you put the turbo back on?


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post #4 of 7 Old 09-21-2009, 05:10 PM
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Sounds like the VGT solenoid
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post #5 of 7 Old 09-21-2009, 06:23 PM Thread Starter
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Thanks for the tips. I know nothing about the VGT relearn. I going to look up how to do it now. any tips or links would be very helpfull. Thanks again
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post #6 of 7 Old 09-22-2009, 07:29 AM
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KAM (keep-alive-memory) reset & VGT learn procedure
The low power and lag problem could be a result of the sevice "Tech" not performing the VGT re-learn strategy after flashing the computer. Here is the strategy you can perform it.

KAM (keep-alive-memory) reset & VGT learn procedure

1. Drive the truck until the engine and transmission have reached normal operating temperature.
(The VGT learn procedure requires that the oil and coolant temperatures be at normal operating temperature)

2. Flash truck back to stock (Only need to do this if running a tuner or module)

3. Turn on the headlights

4. Disconnect both batteries

5. Short out + to - battery cables to each other (Make sure both batteries are disconnected before doing this).

6. Let truck sit like this for 10-minutes

7. Turn off the headlights.

8. Re-connect batteries

9. Cycle the key to the run position twice. Pause in the “ON” position each time until the wait to start lamp goes out (minimum 5-seconds) and pause in the “OFF” position each time for 10-seconds to be sure the PCM has "gone to sleep".

10. Start the truck and let it idle for a minimum of 5-minutes at normal operating temperature. This allows the PCM to learn the EGR valve closed position value. Also you will likely hear the turbo pitch change several times during this period as the PCM learns the necessary duty cycles for accurate VGT control.

11. Complete the road test Drive Cycle:
15 miles of mixed driving (*should* be enough in most cases) to allow the PCM to "re-learn" its adaptive strategy.

Note: Anytime the batteries are disconnected, the PCM will throw the P1000 code until the “Drive Cycle” is completed.


As for the Tow/Haul mode, the transmission must re-learn your driving style and loads hauled again as this was cleared when the truck was re-flashed.

Hope this helps

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post #7 of 7 Old 09-24-2009, 09:12 PM Thread Starter
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I did the VGT learn procedure ran great for the first 15 miles. I turned off my truck and drove it again same problems.So the next day I took my cold air intake off and put stock intake back on and ran great. I am thinking it was the map sensor in my cold air intake may have got wet or broke? but anyways its running great now. thanks for all the help
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