Extreme Turbo Lag/sputtering
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Extreme Turbo Lag/sputtering
Have Suddenly Began Having A Problem. First Noticed That Under High Turbo Boost, The Turbo Seemed To Sort Of Make A Cycling Type Of Noise. Next Thing I Noticed Was After Making A Right Turn Then Accelerating The Engine Seemed To Sputter Or Miss Then Cleared Up. Also The Turbo Lag Seems Extreme. Bad Sensor.....turbo??
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I'm having similar problems after installing a AFE intake system.....I dont know if the intake is at fault or not. I took the MAF out and gave it a good cleaning with electrical spray. If I'm going to take this into Ford, I'm guessing I better get the intake back off there first.
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Originally Posted by tiredlr
Have Suddenly Began Having A Problem. First Noticed That Under High Turbo Boost, The Turbo Seemed To Sort Of Make A Cycling Type Of Noise. Next Thing I Noticed Was After Making A Right Turn Then Accelerating The Engine Seemed To Sputter Or Miss Then Cleared Up. Also The Turbo Lag Seems Extreme. Bad Sensor.....turbo??
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Joined: Mar 2006
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From: SoCal, SD CO. East
If you change stuff, then reset the KAM and retrain. I've have great luck using this procedure. The system must be trained when components are changed.
This, of course, is IMO
This, of course, is IMO
KAM (keep-alive-memory) reset & VGT learn procedure
1. Drive the truck to bring it completely up to operating temp - VGT learn procedure requires that the oil and coolant temps be high enough to allow EGR operation
2. Disconnect both battery ground cables at the same time... turn the headlights on for about 10 minutes - this will deplete any devices that even have a chance of retaining KAM in the PCM.
3. Turn off the headlight switch and reconnect the batteries.
4. Cycle the key to the run position twice to allow the clear procedure to complete..... pause in the on position long enough for the wait to start lamp to prove out and pause in the off position for 10 seconds to be sure the PCM has "gone to sleep".
5. Start the truck and leave it idle for at least 5 minutes... 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.....
6. Now you can road test it and the process should be done...
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Originally Posted by ozx3+1
If you change stuff, then reset the KAM and retrain. I've have great luck using this procedure. The system must be trained when components are changed.
This, of course, is IMO
This, of course, is IMO
KAM (keep-alive-memory) reset & VGT learn procedure
1. Drive the truck to bring it completely up to operating temp - VGT learn procedure requires that the oil and coolant temps be high enough to allow EGR operation
2. Disconnect both battery ground cables at the same time... turn the headlights on for about 10 minutes - this will deplete any devices that even have a chance of retaining KAM in the PCM.
3. Turn off the headlight switch and reconnect the batteries.
4. Cycle the key to the run position twice to allow the clear procedure to complete..... pause in the on position long enough for the wait to start lamp to prove out and pause in the off position for 10 seconds to be sure the PCM has "gone to sleep".
5. Start the truck and leave it idle for at least 5 minutes... 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.....
6. Now you can road test it and the process should be done...
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Posting Guru
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From: SoCal, SD CO. East
Just take your time and follow the step-by-step. Give it AT LEAST 10 minutes to drain the power and 5 minutes to re-learn. You'll get a kick out of listening to the turbo change it's pitch as the process executes.
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Originally Posted by rship72
I'm having similar problems after installing a AFE intake system.....I dont know if the intake is at fault or not. I took the MAF out and gave it a good cleaning with electrical spray. If I'm going to take this into Ford, I'm guessing I better get the intake back off there first.
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You must be a disgruntled Tech?? I obviously wouldn't take the truck in if removing the intake clears the issue?? Anyway, I have a hard time believing the intake had anything to do with this. I'm farily positive its my second wasted turbo, will know more by end of week though.
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[QUOTE=thelogster]Good luck to the technician who gets your truck. He could likely be looking for a problem that no longer exists when you put the stock intake back on. He can then invest a lot of time trying to satisfy a customer -- never knowing you changed the variables and led him on a goose chase.
Last edited by tiredlr; Mar 12, 2007 at 04:41 PM. Reason: wrong reply
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Originally Posted by rship72
You must be a disgruntled Tech?? I obviously wouldn't take the truck in if removing the intake clears the issue?? Anyway, I have a hard time believing the intake had anything to do with this. I'm farily positive its my second wasted turbo, will know more by end of week though.
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Joined: Nov 2004
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From: Templeton, Massachussetts
Originally Posted by thelogster
Good luck to the technician who gets your truck. He could likely be looking for a problem that no longer exists when you put the stock intake back on. He can then invest a lot of time trying to satisfy a customer -- never knowing you changed the variables and led him on a goose chase.
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Originally Posted by ozx3+1
2. Disconnect both battery ground cables at the same time... turn the headlights on for about 10 minutes - this will deplete any devices that even have a chance of retaining KAM in the PCM.