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Thread Tools | Display Modes |
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#1
Fri, May 8th, 2009, 08:19 PM
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Trouble Code Question
I recently put an older big head waste gate actuator on my turbo when I put in the wicked wheel. My buddy had it lying around. We tested it and it worked. When we installed it we preloaded it 1/8" or 3 turns. It definitely does not blow off like the stock one but you can hear it when you put your foot into it between 2 and 3rd gear.
Today after goofing around and putting it to the floor I got a check engine light.  The code was P1249 Waste Gate Control Valve Performance. I asked a couple of buddies and they had never heard of it. Is this really bad or just a nusance code? Should I be worried?  Any help would be greatly appreciated.Thanks Joe
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 2003 4x4 F350 Super Duty Crew Cab Short Bed4" Down pipe and exhaust, Wicked Wheel, Modified Exhaust Turbo Housing, Big Head Waste Gate Actuator, PML Transmission Pan, Factory Tech Valve Body, Autometer Gage Pod, PHP FU2 Chip |
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#2
Fri, May 8th, 2009, 10:58 PM
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Joe,
It's more of a nuisance code. It's no big deal. It has to do with the PCM commanding wastegate operation but the boost still climbing. The sound you are hearing during the 2-3 shift is turbo stall. It's not good for the turbo at all. There is a lot of boost in the intake tract when under load at high rpm. When the transmission shifts, the need for all of that boost is diminished slightly and the air has nowhere to go but back out of the turbocharger compressor. You will not hear a wastegate open.
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory! |
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#3
Fri, May 8th, 2009, 11:56 PM
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Quote:
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DJ Phoenix (my modded) Hi-1200/240Tow/75FS/80DD/100/140SS +Minotaur ASE Master Auto Technician  2001 Ford Excursion 7.3 4x4 Projects. 1970's Hustler and Max II Amphibious ATV's |
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#4
Sat, May 9th, 2009, 10:27 AM
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Nope. Unfortunately, there's not much one can do about it save for not driving the vehicle under those circumstances.
Any turbocharger will do it given the right operating conditions (like surge), but certain turbos will be more immune to it on certain engines. It's caused when there is sufficient heat energy to maintain high boost/high compressor speeds and then instantly it's gone (during a shift or "throttle lift").
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory! |
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#5
Sat, May 9th, 2009, 12:41 PM
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Thanks for the info Cody. I will try to keep my foot out of it as much as possible, as hard as that is going to be.
Just for my own curiosity what kind of damage can that do to the turbo?
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2003 4x4 F350 Super Duty Crew Cab Short Bed4" Down pipe and exhaust, Wicked Wheel, Modified Exhaust Turbo Housing, Big Head Waste Gate Actuator, PML Transmission Pan, Factory Tech Valve Body, Autometer Gage Pod, PHP FU2 Chip |
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#7
Sun, May 10th, 2009, 02:20 PM
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Just put a blow off valve on there.
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Chuck 1992 Calypso Green Mustang notch 1995 Mustang GT 2004 Explorer Limited A veteran is someone who, at one point in one's life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including my life'. That is honor, and there are way too many people in this country who no longer understand it. -Author Unknown |
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